Tag: microtonal music

Notes from Underground: Ivan Wyschnegradsky’s Manual of Quarter-Tone Harmony

[Ed. Note: Some of the unusual melodies and harmonies on the indie rock band Dollshot’s latest album Lalande, two singles from which were just released today on Bandcamp and Spotify, were inspired by an unusual source—the theories of early 20th century avant-garde classical composer Ivan Wyschnegradsky, a Russian émigré in Paris who was a pioneer of microtonal music. Probing deeper, it turns out that Dollshot’s co-leaders, vocalist Rosie K and saxophonist Noah K, are immersed in a very wide range of musical styles. Noah fronts a jazz quartet that has recorded two discs on hatOLOGY and participated in last year’s New Jersey Symphony Orchestra Edward T. Cone Composer Institute at Princeton University. Rosie has composed original works for chamber ensembles and electronics and has also recorded a re-imagining of Benjamin Britten’s Songs from the Chinese with electric guitarist Marco Cappelli. We asked Rosie and Noah to write about how they became interested in Wyschnegradsky, why they translated his 1932 Manual of Quarter-Tone Harmony, and what the implications of Wyschnegradsky’s ideas are for music being created today in all genres.—FJO]

In 1932, Ivan Wyschnegradsky wrote a short yet profound book introducing twelve new tones into the language of classical harmony. Historically excluded from the edifice of harmony constructed around 12-tone equal temperament, these tones from outside the system open new expressive possibilities and expose hidden beauty. The Manual of Quarter-Tone Harmony rewrites the past for the future and pulls back the curtain on the realm of ultrachromatic music.

The Manual of Quarter-Tone Harmony rewrites the past for the future.

The Manual traces the history of Western harmony and systematically injects quarter tones into each stage of its development. Beginning with Baroque-like usages of quarter tones as ornaments and embellishments, it then introduces quarter-tone non-harmonic tones and altered triads, suggesting the harmonic practice of the Classical period. The treatment of quarter tones then extends from simple diatonic progressions to modulations in new quarter-tone keys, then on to quarter-tone chromatic harmony. Part Two introduces artificial quarter-tone scales, followed by quarter-tone atonality and poly-tonality. Wyschnegradsky weaves quarter tones into the fabric of our common musical syntax, showing us how they can enrich—and supersede—our grammar.

Though a return to the strictures of classical harmonic theory may seem opposed to contemporary practice, the operative concept of the tradition of harmonic development is progress, and it is this progressive spirit which animates the Manual. Mapping new harmonies over the old ones offers a comprehensive methodology for the use of quarter tones that composers can choose to follow or reject completely. Wyschnegradsky frees us from circling back over well-trodden territory. The circle is transfigured as harmony steps forward.

Shortly after completing the Manual of Quarter-Tone Harmony, Wyschnegradsky wrote the first edition of his 24 Preludes, Op. 22 in 1934, which would turn out to be a lifelong project and a landmark within his oeuvre. The preludes show a mastery of styles including Romanticism, jazz, and atonality, and they elaborate and exemplify many of the ideas discussed in the Manual beyond the text’s examples. The preludes are based on a quasi-diatonic scale, the chromatic scale diatonicized to 13 tones. In this scale (pictured below), Wyschnegradsky found structural analogies to the major scale; its two heptachords, which include a series of semitone intervals followed by a quarter-tone interval are analogous to the two tetrachords made up of whole tones followed by a semitone that constitute a diatonic major scale (C-D-E-F & G-A-B-C).

Musical notation of Wyschnegradsky's scale of 13 quarter tones in ascent.

Wyschnegradsky’s “chromatic scale diatonicized to 13 tones”

In addition, the chromatic scale diatonicized to 13 tones unifies 13 descending major fourths—a perfect fourth plus a quarter tone—in the space of an octave, beginning from a major fourth above the tonic, F quarter-high, and descending through the cycle of major fourths to B quarter-high. This is analogous to the unification of seven descending perfect fourths in the major scale beginning from a fourth above the tonic, F, and descending through the cycle of perfect fourths to B. This latter feature allows for a scheme of modulations based on the ascending major fourth resolution, as opposed to the ascending perfect fourth (or descending perfect fifth) relationship intrinsic to previous tonal music.

A diagram in musical notation showing how Wyschnegradsky's 13-note scale was derived from a chain of half-augmented 4th (which are a very close approximation of the 11th overtone).

Late in his life, Wyschnegradsky returned to the preludes and dramatically revised them, saturating his original “diatonic” pieces in 24-note ultrachromaticism. This revision coincided with the publication of his article “Ultrachromaticism and Non-Octavian Spaces” (1972) in La Revue Musicale, a new English edition of which will be published by Underwolf Editions in the next year. The 24 Preludes—a highly original work that offers a bold vision of the expansion of harmony—illustrates the depth and utility of the ideas introduced in the Manual.

Yet since its publication 75 years ago, the Manual has passed the years in relative obscurity. There are few records of the book, and the only English translation is long out of print and unavailable. We were both living in Princeton, writing music and developing techniques for playing and singing microtones, when we came across a mention of the Manual in the library. We began a correspondence with Martine Joste of the Association Wyschnegradsky in Paris, who sent us a copy of the book in its original French. We were immediately captivated by its ideas, and the project of translating and publishing a new edition began. In addition to the text, the Underwolf edition includes an audio companion rendering Wyschnegradsky’s musical examples, realized by composer and theorist Christopher Douthitt.

Since its publication 75 years ago, the Manual has passed the years in relative obscurity.

The book went with us everywhere as we prepared the translation, working in coffee shops in Los Angeles, New York, and Montreal, where we traveled to meet Wyschnegradsky’s disciple Bruce Mather. Martine had introduced us to Bruce through a letter. A great composer in his own right, Bruce taught the Manual during his tenure at McGill University. He and his wife, Pierrette LePage, an accomplished pianist and teacher, live between Montreal and France, where they present concerts and perform contemporary microtonal works. Bruce and Pierrette’s living room is taken up almost entirely by two baby grand pianos tuned a quarter tone apart, positioned so that the players face one another. Together, the pianos function like the combined moving parts of a single, profoundly expressive instrument. The musical lines divided between the keyboards crystallize into the most intensely nuanced passages, and the resonance of the quarter tones is strikingly vivid.

Bruce Mather standing beside an upright piano that has been retuned to 96-tone equal temperament (the Carrillo piano).

Bruce Mather with the Carrillo 96-tone piano

While we were visiting Bruce, he took us to the Conservatoire de musique de Montréal so that we could hear the sixteenth-tone “Carrillo piano” that had been specially built for him by the German piano maker Sauter. The piano appears to be an ordinary upright piano, but it has an extended 97-note keyboard whose entire range encompasses one octave, C1 (middle C) to C2. The question of whether one can hear sixteenth tones was decidedly answered for us when Bruce sat down and demonstrated a “glissando” by playing a passage of ultra-ultrachromatic notes. Each sixteenth tone illuminates a distinct, reverberant sound-space. The instrument’s most poignant feature is the surreal and uncanny quality of the resonance warping between such precisely and closely tuned strings. Bruce played some of his piece Etude VII A, in which tonal and quartertonal sonorities bleed into one another, stretched apart by sixteenth tone alterations. The harmonics collide to create a sound akin to a piano being played underwater, the sound waves bent and distorted by the thickness of the substance through which they travel. Bruce organizes a concert each winter in Montreal featuring works written for his special piano.

Hearing the sixteenth-tone piano piqued our interest in its inventor, Julián Carrillo. A contemporary of Wyschnegradsky, Carrillo was an indigenous Mexican composer active in the early 20th century, who traveled from his home in Mexico City to Leipzig to learn what he referred to as the “glorious German music tradition.” After writing music that sounds a lot like Brahms and Wagner, including an impressive opera Matilde o México (1910), Carrillo devoted himself, starting in the 1920s, to composing with microtones. In an artful narrative, Carrillo often recounted how he discovered the existence of microtones in 1895 during an experiment in which he used a razor’s edge to stop the G string on a violin in increments until he reached the note A. Within the whole step G to A he found sixteen discreet sounds. His microtonal system, which he called Sonido 13 (the thirteenth sound), communed with the mysteries beyond 12-note equal temperament. Carrillo had lofty ambitions for Sonido 13, prophesying that “[t]he thirteenth sound will tune the world.” In 1926 he moved to New York where his Sonata casi fantasía was heard by Stokowski, who then commissioned a work for the Philadelphia Orchestra from him. Carrillo reworked the Sonata into his 1927 Concertino in which, in a brilliant stroke of practical ingenuity, he had a chamber ensemble playing microtones against the “normally” tuned orchestra. The composite result was an eminently playable microtonal orchestral piece. Like Wyschnegradsky, Carrillo mastered the history of his art and the dominant style of his time before plunging, out of an inner necessity, headlong into the deep waters of microtonality. And like Wyschnegradsky, he remains an underheard innovator of 20th-century music.

Noah standing in the middle of a recording studio which is cluttered with a drum, a music stand, a speaker and other pieces of electronic equipment.

Noah in the recording studio for Lalande.

The mysterious immediacy of microtones is what initially attracted us to writing and playing ultrachromatic music. Over the past few years, we formed our language of microtones through free improvisation. We experimented with dissonance and sinuous melodic lines, finding beauty in the chilling nearness of tones. When we began writing a new album, Lalande, for our band Dollshot, we envisioned songs composed from the poetics of these new pitches, using quarter tones explicitly to illustrate lyrics and lyricism. They give the music more specificity, more color and conflict.

Lalande is about the tension between selves within the self, mirrored by tones between the tones.

In “Swan Gone,” quarter tones, first introduced in a grinding bassline, finally infect a dreamlike vocal line singing madness from beyond the threshold. In “She” (a setting of a text by Geoffrey Chaucer), quarter tones dramatize psychological friction, the ecstasy and the bitter frustration of a young woman praying to the goddess Diana to protect her from the yoke of marriage and motherhood. Lalande is about the tension between selves within the self, mirrored by tones between the tones. Though the music of Lalande is worlds apart from Wyschnegradsky’s, its source is the same mystical fascination with the expressive power of microtones from which he drew his inspiration.

The democratization of sound as music, the dissolution of genre, and our engagement with machines for creating and producing new music were once escapes from the confines of tradition.

Now, more than seventy-five years after the initial publication of the Manual of Quarter-Tone Harmony, new tones are still all too often treated as belonging to a shadow world, lurking behind a pleasing, preferred reality. Inherited aesthetics still reign, circumscribing the attributes of creative work and imposing criteria for its judgment. The popular acceptance of new tonalities lags behind the revolutions of the last century. The democratization of sound as music, the dissolution of genre, and our engagement with machines for creating and producing new music were once escapes from the confines of tradition. Ultrachromaticism—in which all possible tones are treated as real tones–lies in waiting. How many times do we walk by the door and not open it? The Manual of Quarter-Tone Harmony is the key. The moment has arrived to unleash a flood of radical new expression.

Rosie K standing in front of a microphone in a recording studio, which some sheet music nearby.

Rosie in the recording studio for Lalande.

Over his lifetime, Wyschnegradsky used many different divisions of the octave in his music. The use of quarter tones and equal temperament is one decidedly pragmatic way forward. Quarter tones are easy to play on most instruments and double the resolution of the pitch spectrum, as if we were suddenly seeing an image with much greater clarity. Hidden details that were always there but whose visage and meaning eluded us are brought into relief. Ways of seeing, perhaps, can point towards ways of hearing. The enhanced equal-tempered octave reorients our musical thinking, leading to new perspectives in the treatment of consonance and dissonance, voice leading, and modulation. These potentialities are explored in the Manual. The 24-note equal-tempered octave is not an end, but a beginning. A vista where the ultrachromatic landscape becomes visible, unfolding before us. The Manual does not prescribe, it beckons.

The 24-note equal-tempered octave is not an end, but a beginning.

There is hardly a more abstract investigation of possibility than in writing music. The most unnatural yet naturally expressive realities of sound and form are imagined, then heard. To hear beyond what history and culture dictate is visionary. The expansion of our musical language must draw from within.

It is only by going under that we can cross over.


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Rosie K is a composer and vocalist from Virginia. She co-leads the band Dollshot, whose second album Lalande will be out in 2018. Recent recordings include an EP reimagining Benjamin Britten’s Songs from the Chinese with electric guitarist Marco Cappelli, and a collaboration with sound artists Desmond Knight. She has performed and recorded with Rinde Eckert, Federico Ughi, Quinn Collins, Caroline Park, Jeff Snyder, Christopher Douthitt, Marco Kappelli, Kevin McFarland, and Sarah Bernstein, among others. As composer, she writes predominantly for small ensembles and electronics. Read more »


Noah K is a composer and saxophonist from Topanga, CA who blends the dark energy of free jazz with Romantic lyricism in new realms of tonality. His music has been performed by the New Jersey Symphony, Orchestra 2001, JACK quartet, PRISM quartet, So Percussion, and the American Modern Ensemble, among others. He co-leads the indie pop band Dollshot and is currently collaborating with screenwriter Hampton Fancher (Blade Runner, Blade Runner 2049) on Salvation, an opera trilogy. As an improviser, Noah has performed and/or recorded with Joe Morris, Anthony Coleman, David Tronzo, Peter Erskine, Alan Pasqua, Rinde Eckert, Mat Maneri and Joe Maneri, among others. The Noah Kaplan Quartet has recorded two albums for HatHut Records, Descendants (2011) and Cluster Swerve (2017).Read more »


Implications of Polychromatic Music

The development of new musical languages (like any language) provides a conceptual framework for the discovery and expression of an expanding awareness of the world. And like the chicken/egg paradox, the process of exploration and discovery itself often creates a need for the development of new language.

The polychromatic system is intended to remove some of the practical difficulties associated with the exploration of the expansive and integrated worlds of micro-pitch and harmony—exponentially increasing the tonal resources available to musicians and composers. Optimally, it can facilitate a seamless assimilation of diverse sonic pitch-palettes within the pitch continuum.

The experience and practice of polychromatic music brings to auditory awareness new harmonic interactions and multidimensional spatial effects. Additionally, the increasing auditory perceptual discrimination developed in the practice may lead to innovations in ‘hearing’ research models and methodologies within science.

Randomized studies do not help elucidate the vast, uncharted potentials of human perceptual development.

Perceptual (psychoacoustics) and medical (audiology) research is conventionally based on randomized studies. Implicit in this methodology is a delineation of statistically significant, average responses. Unfortunately, this methodology does not help to elucidate the vast, uncharted potentials of human perceptual development which could be demonstrated by the intensive study of trained and exceptional (nonrandom) subjects. It seems intuitively obvious that a great deal of qualitative information regarding color perception would be gained by research conducted with painters and visual artists—those who have the intensive perceptual practice and development, as well as a vocabulary to express their qualitative awareness. Unfortunately, medical research tends to be based on quantitative (measurable) data and statistical analysis, and as a result, immeasurable aspects of qualitative ‘data’ lie beyond its scope. And yet, it is precisely these qualitative aspects of perception which are the greatest strength of Art. This suggests an integrated sense of Art and Science as complementary (qualitative-quantitative) perspectives.

My practice and experience with high pitch-resolution scales (72 and 106 equal divisions of the octave) within the polychromatic system has made me aware of the lack of integrated models of ‘hearing’—expanding beyond the ears to include the perceptual limits and qualities of sound/vibration, sensed through active touch, the skin, and teeth/bones, etc. Medical science models are still rooted in anatomical concepts which segment the senses by organ: sight/eye, hearing/ear, touch/skin. Yet, the perceptual effects of polychromatic music (harmonic interactions, sensations of dynamic, multidimensional auditory structures, physical resonance, etc.) inspire my curiosity about the perception of sound through an integration (gestalt) of conceptually separated senses. I also wonder about the scientific and aesthetic innovations possible with the practice and development of integrated visual/auditory associative synesthetic awareness.

I am curious about the impact of ultrasonic (> 20 KHz) harmonic interactions which create audible effects within our audible range. Rudimentary examples of audible harmonic interactions are found in the perception of combination tones (sum and difference tones). The definition of combination tones is revealing of the current conceptual framework of auditory perception: “a psychoacoustic phenomenon of an additional tone or tones that are artificially perceived when two real tones are sounded at the same time.”

Here is a musical example of this type of artificial perception of pitch:

Because the qualities of perceptible combination tones are not measurable by technology and do not fit into theoretical hearing models, their presence is relegated to a category called auditory “distortion products”. In other words, the anomaly is conceptualized as a deficiency in perceptual awareness rather than a deficiency in the theoretical model of perception.

Rather than thinking of the ear/hearing as a passive organ/process involved in receiving/decoding the sounds of the world, it is important to recognize that the ear (cochlear apparatus) produces sound as well. These phenomena are recognized by science as otoacoustic emissions and are poorly understood. Otoacoustic emissions are defined as low-level sounds generated by the ear as a natural by-product of the hearing process. They can occur spontaneously or in response to incoming sound stimuli. They have been documented scientifically by small microphones placed within the ear canal. Thus far these microphones are detecting only sounds within a limited frequency bandwidth. The impact of ultrasonic frequencies generated by the ear and the resulting perceptual effects of their interaction with incoming sounds would be an amazing area of research.

Further intensive research into human perception of the effects of these types of ultrasonic harmonic interactions may provide a basis for the future development of high-resolution audio technology which implements frequency response capability, end-to-end, extending far beyond 20 KHz.

The wider impacts of polychromatic music as a practice and system of artistic expression are compelling in our era of increasingly pervasive technology and artificial intelligence. New perspectives of reality, meaning, and individual responsibility are emerging in response to a world of virtual and augmented reality, robotics and beyond. The human impacts of these emerging technological perspectives are worthy of reflection.

The active interactions and unique expressions of the individual are increasingly impeded in the converging, highly routinized, and homogenizing tendencies of a society oriented toward efficient conformity. Standards of practice, procedures, and algorithms are implementations of mechanical processes on human activity and behavior. In this context, the unique expression and development of each individual’s potential is minimized and sometimes actively invalidated.

As artists, our gift is a catalyst, meant to be shared.

The arts provide nourishment to the creative, imaginative, intuitive, and emotional aspects of human existence. As artists, our ‘gift’ is a catalyst, meant to be shared, in the hope of igniting these innate characteristics of full and vivid living awareness, in all who are receptive to the opportunity to openly experience and interact with art.

We also have choices about how we express creativity through technology. Will we efficiently conform to the processes defined by the software and creatively work from that baseline and within the limitations of that framework? Will we inefficiently find workarounds to make technology do things it was never designed to do?

The trajectory of progress seems to move us further into the role of passive consumers of technology. Our essential purpose as artists may be to rekindle human imagination, intuition, and creativity from within a technological culture which tends to make these qualities irrelevant. Art exists to catalyze the growth of aesthetic awareness and recognition of meaning, values, and purpose in a detached world of consumption, diversion, and ‘progress’.

The process of creation and interaction with art provides a context for the practice of sustained concentration and active conscious engagement in an era of increasing distraction, passive entertainment, and decreasing attention spans. Passive engagement with change and technology develops only further passivity. And a vivid engagement cannot spontaneously emerge when creative interaction is not actively pursued and practiced. Patience is the essential lesson from the study of music and is all-important in an era of instant gratification. The more challenging something is to attain, the more rarely it is developed. By recognizing value in the practice and in patience, our orientation to and interaction with nature and each other can be transformed into a more expansive perspective of value, purpose, and meaning.

Passive engagement with change and technology develops only further passivity.

In our modern era, with its immense and quickening expansions in knowledge, collaboration is essential for pushing each dimension of aesthetic expression to its farthest potential. This collaboration becomes an integrated creative expression, one of interacting individuals with diverse areas of expertise (music, technology, science, design, visual art, etc.); a new creative context of synergistic influences beyond the segmented and arbitrary divisions of art and not-art.

The enduring value of authentic art has nothing to do with commodity value, yet this is the overwhelming message of our era. It is essential for artists to see the importance of their role in society: in catalyzing inspiration, imagination, intuition—those immeasurable human qualities that are essential to a vivid life experience filled with growth, meaning, and active engagement.

The idea of ‘simulated’ art in an era of computers and electronic music describes a tendency toward artworks with an increasing magnitude of technologically assisted and generated content. Simulated music would describe recordings of music created without any actual musicians (samples, loops, sequencing, etc.) as well as an increasing pervasiveness of technological compensation and enhancement of human musicianship – i.e. with autotune (melodic quantizing), harmonizers (harmony quantizing), sequencers (rhythmic quantizing) – in a sense, recreating a ‘clockwork universe’ aesthetic in music. Perhaps in the future, art will become categorized on a scale indicating the extent of authentic human creation/performance content. No value judgements are intended here, just a search for descriptive distinctions regarding the relative degree of direct human involvement in the creation of modern art.

Technology is now presenting us with captivating simulations of experience. Our choice and responsibility is to determine what role, value, and importance we place on technological simulation in our creative and expressive processes.

The immeasurable human qualities of creativity, imagination, and intuition are not only elements that make us most vividly human, but may ultimately be what distinguishes us from increasingly sophisticated technology.

[Ed. Note: Dolores Catherino’s talk above was given at a TEDx event in 2016 using the TED conference format but independently organized by a local community.]

Creating Music with the Polychromatic System

The creation and development of the polychromatic system came as part of a process of practicing and exploring musical possibilities with the Tonal Plexus keyboard. The Tonal Plexus is a microtonal keyboard controller with 211 programmable key-switches (buttons) per octave, designed and manufactured by Aaron Hunt of Hpi Instruments.

I needed to find an intuitive and efficient way to work with 106 notes per octave.

After creating different ergonomic note layouts for the buttons and programming the pitch values for each note assignment, I needed to find an intuitive and efficient way to work with 106 notes per octave. Rather than create another chromatic notation with an overwhelming number of pitch modifier symbols, I expanded chromatic notation into the micro-pitch color dimension and generalized the idea of pitch-color so that it could be used with any pitch division method. As a result, I can use the same polychromatic framework for my practice with 106 and 72 equal divisions of the octave—the values, in Hertz, of each pitch-color vary with each pitch derivation method, while the foundational system remains the same.

The layout of octave (with 106 steps differentiated by color) on the Tonal Plexus.

The layout of octave (with 106 steps differentiated by color) on the Tonal Plexus.

The next task was to explore different note layout configurations to simplify the technique required to gain a musical proficiency in playing hundreds of key-switch buttons. An option I decided on, was thinking of the keyboard as several horizontal multi-note regions. So, a region (module) of five key switches could be thought of as a kind of ‘string’ on a violin, with each pitch of the module transposed up a fifth from its vertically adjacent module. This is more clearly described in the video below:

This layout pattern greatly expanded the possible fingerings for scales and chords and made more intervals accessible within the reach of a hand span. The Tonal Plexus layouts I use have an advantage of redundant chord/scale fingerings (like the multiple position patterns of each scale on the guitar). These options allow for increased technical flexibility.

The Microzone u648 is built by Starr Labs and has 72 hexagonal key-switches per octave, It is a highly programmable microtonal keyboard which supports overlapping and uniquely shaped ‘zones’ of note layout. However, the type of redundant polychromatic note layout structures that are possible on the Tonal Plexus can’t be implemented on the Microzone u648 without severely limiting its pitch-resolution (i.e. 36 edo with two sets of 3 note ‘modules’, programmed a fifth apart). Instead, I program the Microzone with a simple note layout of stacked chromatic scales. This layout is far easier for conceptualizing the polychromatic system and transferring standard keyboard technique. But it is much more restricted in terms of playing technique, flexibility, and scale/chord possibilities within the hand span.

Keyboard layout on a Microzone u648

Keyboard layout on a Microzone u648

Once a note layout is created for the keyboard, I have to create a pitch layout for each note. To create the micro-pitch tuning layouts for these keyboards, I use the Custom Scale Editor (CSE) software developed by Aaron Hunt. The CSE provides an intuitive user interface with many diverse modes of micro-pitch programming functionality (i.e. ratios, Hertz, cents, user definable algorithms, functions, and constants). I have been using fractions in my tuning layouts—so, 72 edo would be programmed as a sequence from 1/72…72/72.

So far, I have been primarily focused on the exploration and composing process and have not had the time to delve into the expansive areas of sound design and MIDI editing. Currently, my primary sound sources include Omnisphere (with 8 channels of channel-independent pitch bend per instance/track) and Kontakt (with 16 channels of channel-independent pitch bend, per instance/track, in omni mode). I edit the sounds I use to have rich harmonic content without sounding brittle or harsh, and to be relatively free of modulation and detuning effects. I do like the sound of a very slow LFO (low frequency oscillator) because, at times, it seems to intensify the qualities of micro-harmonic interactions and structural movement.

My Composing Process

The immensity of new musical possibilities can seem overwhelming.

The immensity of new musical possibilities within the polychromatic system can seem overwhelming. My approach to working within this new paradigm is to continue mastering chromatic rudiments (intervals, scales, chord voicings), and then use this as a basis to begin exploring the vast pitch-color modifications possible within the polychromatic system. I also make sure to practice in all 72 keys so I can continue developing better pitch discrimination, technical fluency, and a sense of the unique qualities of each key.

In this early exploration stage, I orient my polychromatic compositions toward bringing out the sonic qualities of micro-pitch combinations and harmonic/overtone interactions within a musical context of integrated harmony/polyphony and contrast. This is achieved by focusing initially on complex harmony/harmonic qualities over rhythmic, melodic, and sound design/timbral complexity.

As I am working on a composition, I use pencil and paper to transcribe my musical ideas and develop the piece. This handwritten sketch is what I memorize for audio and video recording of the composition. After the performance is recorded, I use Finale notation software to transcribe it into a monochromatic score. Finale only supports the assignment of a single color per pitch, per score. Because of this, I need to export the score as individual image files into Illustrator, a vector graphics editor, to create the polychromatic pitch and symbol coloration of the composition. Finally, these colorized image files are exported into PDF (portable document format) for publishing the polychromatic score on the internet.

I don’t think of polychromatic music as an enhancement of monochromatic music. It is a new musical system and aesthetic that uses the older chromatic framework as a point of departure. The point of these polychromatic explorations is to develop a new, expanding aesthetic within which, the monochromatic framework is only one tonal perspective of many.

Trying to explain what specific new emotions polychromatic music expresses is like trying to describe the color indigo to a person who has never seen it.

I have been asked what specific new emotions or auditory experiences polychromatic music expresses. Seeking an answer to this seems similar to the inevitable difficulty of describing, in words, a process that must be experienced perceptually. It’s like trying to describe the color indigo to a person who has never seen it: maybe as a color ‘in between’ blue and violet. But this, in turn, presumes a prior perceptual experience of blue and violet as well as an understanding of a conceptual color-space which frames the idea of ‘in between’.

So I try to express the new perceptual experiences of polychromatic music by using elements of monochromatic tonality as a foundation to diverge from and contrast with. My composition process is intuitive and guided by exploring new audible qualities and dynamic structures. The ear guides the process, with the secondary assistance of conceptual musical forms and theory. In this sense, monochromatic training, practice and theory are an important foundation and can be effectively used as a starting point – a musical basis to expand from. This is part of the process of expressing new experiences by comparison and through contrast. An established context (tradition) of understanding seems essential as a ‘bridge’ toward expanding musical awareness, perceptual experiences, and paradigms of understanding. And in a larger sense, the awareness, insights, and understanding gained through artistic exploration and expression of micro-pitch music and sound design may also assist in the development of new awareness and insights in the sciences.

In the next and final article in this series, we will explore potential implications of the polychromatic system – for future developments in music, technology and science.

Composing Xenharmonic Music

A very important aspect of music composition is, of course, that of consonance and dissonance. Consonant chords sound clean and smooth, whereas dissonant chords sound harsher and generally have an audible “beating,” like a fast tremolo. Dissonance lends the feeling of an unanswered question (such as a dominant 7th chord), and consonance gives us the feeling that it has been answered (such as a major triad). This basic concept of various musical passages leading us through question-and-answer or tension-and-release feelings should be as valid in xenharmonic music as it is in standard twelve-tone music. But it’s a challenge!

Let’s begin with the fact that you can throw most of the harmony lessons you’ve ever had right out the window when composing xenharmonic music. We don’t necessarily hear standard concepts like “major” or “minor” or “dominant” in other tunings. Instead, each tuning is its own alien world ripe with unexplored territory, each with its own set of melodies, chords, and progressions waiting to be discovered and theorized. When we do stumble upon note combinations that remind us of standard chords, they may sound a bit “off,” or else the transition from one chord to another may feel slightly different than what we’re used to. That kind of push and pull on our traditionally trained music brains is what I personally enjoy.

You can throw most of the harmony lessons you’ve ever had right out the window when composing xenharmonic music.

Xenharmonic purists tend to focus on the mathematics of tunings, expressing tonal relationships as interval ratios. They generate beautiful mathematical charts, entropy maps, and latices, which deeply inspire xenharmonic composers, including those of us who aren’t purists! However, many xenharmonic musicians take the desire for pure ratios to an extreme, wanting everything to be perfectly in tune. This leads to an interest in “just tunings” (unequal temperaments based on pure ratios), or using a zillion-notes-per-octave or even “dynamic tunings” that offer a constant stream of perfect chords–as free as possible from any beating. The more pure the ratios (low number integer ratios are purest), the cleaner and smoother the sound.

Harmonic entropy plotted for triads.

Harmonic entropy is plotted for triads. See the original post on The Xenharmonic Alliance.

In my mind, however, the more important angle to consider is how we perceive one note or chord leading into the next. We hear music over time as a series of notes and chords, after all. Harmonic movement is where emotion and meaning comes alive in a composition. That is far more important to me than whether each individual snapshot in time is in tune or not. It is all a matter of taste and aesthetic, but I don’t usually enjoy music that is based on pure ratios throughout, because it sounds one dimensional to my ears. It misses the boat on dissonance, which is just as important as consonance. Yin and yang, light and dark, tension and release!

Dissonance is just as important as consonance.

Beating or not, partly what contributes to our sense of consonance and dissonance is simply what we’re used to. In the Western world we’ve heard our imperfect twelve-tone equal temperament all our lives, and therefore may perceive perfectly in-tune 3rds and 6ths as sounding worse than their tempered counterparts, which have more beating. That simple fact has sparked much curiosity and debate about how our brains actually perceive consonance and dissonance.

It may be a surprise to learn that modern research shows strong evidence that beating is not the best measure of whether chords and intervals sound pleasant or in tune (Edward Large et al.). Our brains don’t directly decipher in tune-ness from beating. What actually happens when we hear musical sound is that our neurons begin oscillating, and this “neural resonance” dynamically “pulls” intervals into tune, as long as the frequencies are within proximity to ratios of the harmonic series. In chaos theory speak, our neural oscillations become an “attractor.” In musician speak, if it’s close enough for rock’n’roll, it will sound in tune!

In musician speak, if it’s close enough for rock’n’roll, it will sound in tune!

I think this is good news all around. For one, the research shows that our sense of consonance is indeed driven by our preference for the harmonic series, and therefore all of our traditional musical ideas still stand. But more profoundly, it shows that our traditional harmony is a mere branch of something larger. With every new research paper in this field, we can begin to see the outlines of a universal harmonic theory, implying that we can develop unique but related “harmonic rules” for any tuning.

Now enter my world as an equal-temperament composer. I believe that music composition in equal temperaments is easier and simpler than using “just” tunings or other options and that it’s an entirely legitimate means of music composition. For me, personally, equal temperaments have offered decades of fascinating exploration—messy ratios and all. I prefer to fully explore equal-tempered tunings that have a very limited number of notes, such as 10edo, 16edo, 17edo, or 19edo, and discovering their particular “flavor”, as opposed to working with something like 53edo that has so many choices of frequencies that it doesn’t, in itself, offer a distinct flavor.

What are these flavors I speak of? In general, microtonal scales (smaller than half steps) offer a tenser vibe, and macrotonal scales (larger than half steps) have a more open and alien feel. Any tuning can just as easily sound ugly or exotic or beautiful. It really truly depends on how it is used. When I’m trying out a new tuning, it always starts off on the ugly end of the spectrum until I mess around for quite a while, eventually discovering chord combinations and nifty melodic lines, and what intervals to avoid.

Any tuning can just as easily sound ugly or exotic or beautiful.

It really helps to have a proper instrument to discover your new tuning on. Even if you aren’t a piano player, keyboard “controllers” (meaning no internal sounds–just keys) are a very flexible and relatively inexpensive way for anyone to get into xenharmonic composition or to expand the setup you may already have. And this goes hand in hand with the “virtual instrument” synthesizers I reviewed last week. I have collected several keyboards over the years and have rearranged the black/white keys for each of my favorite tunings.

The current trend is to use M-Audio Keystations (49, 61, or 88 keys), which can be had for anywhere from $50-$200 on eBay and other online stores. If you can afford it, buy more than one so that you will have extra keys. You’ll need them if you’re going to dive in and rearrange the keys! Some tunings will need extra black notes, and some will need extra white notes. It’s cheaper in the long run to buy extra keyboards rather than extra individual keys, which are usually marked way up in price.

Here is a video that shows how I remove and rearrange keys on an 88 note Keystation–in this case, for a 15-note tuning which requires lots of black keys! As you’ll see, you only need a screwdriver, needle nose pliers, and possibly a sander of some sort.

One deciding factor in choosing a tuning is the level of difficulty in building a keyboard. Scales that require a smaller ratio of white notes than normal are easier to put together. White keys have a wider area to contend with and trying to squeeze more of them on the keyboard causes a need for them to be thinner. I have sanded many white keys thinner in my day. It works but is not ideal, as pianists are used to uniformly sized white keys. On the other hand, using more black keys than normal results in gaps between the keys, and thus a wider spacing than normal.

I will show a few keyboard examples here along with music links for each, and perhaps you’ll see/hear something that attracts you. Then you can either build one yourself, or ask one of us to build one for you!

10edo is one of my all-time favorites, and yet it gets a bad rap for its impure ratios. Here is something I wrote in 10edo. The diatonic scale in 10edo has larger half and whole steps than 12edo, and the thirds are right in between Major and minor, lending to its alien feel. The diatonic scale has a harmonic minor vibe to it. In a perfect world, a ten-tone keyboard would look like this:

An idealized 10-tone keyboard

However, putting three white keys in a row would involve skipping some of the keyboard contacts where there would normally be a black note. One solution is to make the C a black note painted white. However, it would be a bit strange since C is the first note of the diatonic scale.

Otherwise, here is my “cheater way,” as I call it: Sawing off the wide part of the white keys allows any desired black/white key arrangement. For this style of keyboard, I remove the entire keyboard cover and build my own handle onto the back. It looks prettier than having a big gap where the white keys are chopped off, but fashioning the handle itself is work! I would not judge anyone who leaves it in the original casing.

10 tone "Jupitar" Vertical Keyboard


10 tone “Jupitar” Vertical Keyboard by Elaine Walker

19edo is highly recommended for anyone who feels a bit intimidated by xenharmonic music composition and would like to ease into it. It is a good “transition tuning,” as it offers something close to our 12-tone diatonic scale but with more pure 3rds and 6ths. Mind you, it has worse 4ths and 5ths–there is always a tradeoff. The experience of 19edo is like an exotic version of 12edo, with some extra black notes for ornamentation. Here is one of my 19edo songs from the ‘90s.

The most typical 19edo keyboard, however, requires doubled up black keys, which leaves unsightly gaps. But again, who’s going to judge? Not I! Simply play a whole step instead of a half step, and a minor third instead of a whole step, and you’ll see the relationship to 12edo!

19-tone keyboard

19-tone keyboard by Darren McDougall. Having more black notes than usual creates gaps between the white keys.

The 17edo keyboard is easy to make, as it has the same ratio of black:white keys as 12edo. It looks like a surreal piano. I thought 17edo sounded terrible until I got used to it, and now it is one of my favorites. 17edo is also a clear favorite in the xenharmonic community. Here is something I composed in 17edo.

17-tone "Insanetar" Vertical Keyboard

17-tone “Insanetar” Vertical Keyboard by Elaine Walker. The keys fit perfectly since it has the same ratio of white and black keys as a standard piano.

Here is a 13edo keyboard which has some white keys shaved thinner. 13edo music is neuron-bending since it is just slightly off from 12edo. Enjoy this 13edo music by Aaron Andrew Hunt. I would not suggest trying this at home. I mainly wanted to show this crazy keyboard with the squished white keys around the single black notes.

13-tone keyboard

13-tone keyboard by Elaine Walker. Having more white notes than normal causes them to not fit. Some white keys are sanded thinner.

When you start looking around The Xenharmonic Alliance and other websites, you will notice many other keyboard options, such as isomorphic keyboards, although they tend to be quite pricy and largely unavailable. My favorite of these is a specific type of hexagon keyboard, known as a sonome (which is like saying “hexagon piano”). If you can get your hands on something cool like this, do it! It will open up a world of xenharmonic improvisation that isn’t as easy on a regular keyboard. Having a five octave reach, seeing chords as “shapes,” and being able to transpose while maintaining the same fingering, can make xenharmonic composition a much smoother experience.

I suggest that you not worry about theory.

Whichever tuning or instrument you choose to compose with, I suggest that you not worry about theory and just improvise by ear for as much time as you can spare. Don’t fret over the specifics of your timbres beyond whether they sound good to you–that is, if you want to compose truly beautiful xenharmonic music. At some point you will want to see what theory is “out there” for your tuning, if any, and it will be interesting to compare it to what you come up with on your own. Share your music and findings with the xenharmonic community. It is always exciting when someone posts new music. Don’t be shy about asking questions. We’re all happy to help and we even build keyboards for each other.

I will leave you with some more informative links:

My page on microtonality
My FAU lecture on microtonality
The Xenharmonic Alliance
My personal website

Xenharmonic performance at Berklee

Xenharmonic performance at Berklee College of Music, 2010