29edo might actually be one of the best gateways into microtonal music for musicians who already know their theory — and I'll explain what it sounds like, how it works, and what you can do with it
First: What Even Is an EDO?
In standard Western music, we divide the octave into 12 equal steps of 100 cents each (a "cent" being 1/100th of a semitone). That's what your piano, your guitar, and pretty much every Western instrument is tuned to — 12-edo.
An EDO is just that principle extended to any number. 24-edo splits the octave into 24 equal steps (this gives you quarter tones, popular in Arabic and Turkish music). 19-edo gives you 19 steps. 31-edo gives you 31. And so on. Each one is its own complete tuning universe, with its own version of familiar intervals, its own scales, its own characteristic sound.
29-edo divides the octave into 29 equal steps of about 41.4 cents each. That's smaller than a semitone but bigger than a quarter tone. If 12-edo is the grid of a city, 29-edo is a finer grid — one that contains most of the same streets, plus quite a few new ones.
You can read more about the general concept on the Xenharmonic Wiki's EDO page.
In standard Western music, we divide the octave into 12 equal steps of 100 cents each (a "cent" being 1/100th of a semitone). That's what your piano, your guitar, and pretty much every Western instrument is tuned to — 12-edo.
An EDO is just that principle extended to any number. 24-edo splits the octave into 24 equal steps (this gives you quarter tones, popular in Arabic and Turkish music). 19-edo gives you 19 steps. 31-edo gives you 31. And so on. Each one is its own complete tuning universe, with its own version of familiar intervals, its own scales, its own characteristic sound.
29-edo divides the octave into 29 equal steps of about 41.4 cents each. That's smaller than a semitone but bigger than a quarter tone. If 12-edo is the grid of a city, 29-edo is a finer grid — one that contains most of the same streets, plus quite a few new ones.
You can read more about the general concept on the Xenharmonic Wiki's EDO page.
Why 29edo Specifically?
Here's the key selling point for musicians coming from a 12-edo background: 29edo has an excellent perfect fifth.
In standard 12-edo, the perfect fifth is 700 cents — which is 1.955 cents flat of the pure, acoustically ideal "just" fifth of 701.955 cents. That's close enough that we accept it without thinking, but it's technically a small compromise.
In 29-edo, the perfect fifth is 703.448 cents — only 1.5 cents sharp of just. That's actually more accurate than 12-edo's fifth. And because the fifth is the engine of all Western harmony — underpinning the circle of fifths, chord progressions, key relationships, voice leading — having an accurate fifth means that 29-edo preserves almost everything you know about how music works harmonically.
The circle of fifths still functions exactly as you'd expect. The diatonic major and minor scales still exist. Chord progressions still resolve. Cadences still cadence. If you sat down and played a Bach chorale in 29-edo, it would sound recognizably like a Bach chorale — just with a slightly different color and a few new options available to you.
This makes 29-edo a "positive temperament" — meaning its fifth is sharp rather than flat. The technical term is Parapythagorean, as opposed to the "meantone" systems (like 31-edo) where the fifth is slightly flat.
Here's the key selling point for musicians coming from a 12-edo background: 29edo has an excellent perfect fifth.
In standard 12-edo, the perfect fifth is 700 cents — which is 1.955 cents flat of the pure, acoustically ideal "just" fifth of 701.955 cents. That's close enough that we accept it without thinking, but it's technically a small compromise.
In 29-edo, the perfect fifth is 703.448 cents — only 1.5 cents sharp of just. That's actually more accurate than 12-edo's fifth. And because the fifth is the engine of all Western harmony — underpinning the circle of fifths, chord progressions, key relationships, voice leading — having an accurate fifth means that 29-edo preserves almost everything you know about how music works harmonically.
The circle of fifths still functions exactly as you'd expect. The diatonic major and minor scales still exist. Chord progressions still resolve. Cadences still cadence. If you sat down and played a Bach chorale in 29-edo, it would sound recognizably like a Bach chorale — just with a slightly different color and a few new options available to you.
This makes 29-edo a "positive temperament" — meaning its fifth is sharp rather than flat. The technical term is Parapythagorean, as opposed to the "meantone" systems (like 31-edo) where the fifth is slightly flat.
The 12-edo Twin — With Opposite Errors
Here's something genuinely surprising. 29-edo has been called the "twin" of 12-edo, and for good reason.
In 12-edo, the major third (400 cents) is 13.7 cents sharp of a pure major third (386.3 cents). This is the interval that makes a piano sound slightly harsh compared to a choir singing in tune.
In 29-edo, the major third (about 372 cents) is about 13.9 cents flat of just. Same absolute error, opposite direction. The two systems make essentially the same harmonic compromises, but in mirror image.
This means that if you've been trained to hear 12-edo's major third as "normal," 29-edo's major third will sound noticeably different — slightly smaller and darker. But it won't sound random or chaotic. It'll sound like a coherent, internally consistent alternative universe.
Here's something genuinely surprising. 29-edo has been called the "twin" of 12-edo, and for good reason.
In 12-edo, the major third (400 cents) is 13.7 cents sharp of a pure major third (386.3 cents). This is the interval that makes a piano sound slightly harsh compared to a choir singing in tune.
In 29-edo, the major third (about 372 cents) is about 13.9 cents flat of just. Same absolute error, opposite direction. The two systems make essentially the same harmonic compromises, but in mirror image.
This means that if you've been trained to hear 12-edo's major third as "normal," 29-edo's major third will sound noticeably different — slightly smaller and darker. But it won't sound random or chaotic. It'll sound like a coherent, internally consistent alternative universe.
New Intervals: What Does 29 Give You That 12 Doesn't?
This is where it gets exciting. Beyond all the familiar intervals, 29-edo introduces four genuinely new ones that don't exist in 12-edo at all. These are sometimes called interordinal intervals — they fall in between the standard interval categories rather than within them.
Here's the full picture of new territory:
The Diesis (~41 cents) — This is the basic step size of 29-edo. It's smaller than a minor second and functions more like a very large "accidental" than a melodic step. Three stacked major thirds land on this interval rather than the octave (since 3 × ~413 cents ≈ 1241 cents, overshooting the octave by one step).
The Chthonic Third (~248 cents) — Landing between the major second and the minor third, this interval has no equivalent in 12-edo. Two of them add up to a perfect fourth, which gives it a natural structural role. Think of it as a very compressed minor third, or a very wide major second. The Chthonic triad is built from two of these stacked on top of each other.
The Naiadic Third (~455 cents) — Sitting between the major third and the perfect fourth, two of these add up to a major sixth. It functions as a kind of "super-major third" — wider and more exotic-sounding than a major third but not quite a fourth.
The Cocytic Sixth (~744 cents) — Between the perfect fifth and minor sixth. Two of these reduce to a minor third.
The Ouranic Sixth (~951 cents) — Between the major sixth and minor seventh. Two of these reduce to a perfect fifth.
The terminology here is taken from Unque's compositional approach to 29edo, which provides an excellent theory-grounded entry point for the system. You don't need to memorize these names to enjoy 29-edo, but having names for things helps when you start composing.
This is where it gets exciting. Beyond all the familiar intervals, 29-edo introduces four genuinely new ones that don't exist in 12-edo at all. These are sometimes called interordinal intervals — they fall in between the standard interval categories rather than within them.
Here's the full picture of new territory:
The Diesis (~41 cents) — This is the basic step size of 29-edo. It's smaller than a minor second and functions more like a very large "accidental" than a melodic step. Three stacked major thirds land on this interval rather than the octave (since 3 × ~413 cents ≈ 1241 cents, overshooting the octave by one step).
The Chthonic Third (~248 cents) — Landing between the major second and the minor third, this interval has no equivalent in 12-edo. Two of them add up to a perfect fourth, which gives it a natural structural role. Think of it as a very compressed minor third, or a very wide major second. The Chthonic triad is built from two of these stacked on top of each other.
The Naiadic Third (~455 cents) — Sitting between the major third and the perfect fourth, two of these add up to a major sixth. It functions as a kind of "super-major third" — wider and more exotic-sounding than a major third but not quite a fourth.
The Cocytic Sixth (~744 cents) — Between the perfect fifth and minor sixth. Two of these reduce to a minor third.
The Ouranic Sixth (~951 cents) — Between the major sixth and minor seventh. Two of these reduce to a perfect fifth.
The terminology here is taken from Unque's compositional approach to 29edo, which provides an excellent theory-grounded entry point for the system. You don't need to memorize these names to enjoy 29-edo, but having names for things helps when you start composing.
Sharps and Flats Still Work — But Differently
One of the biggest practical concerns when approaching a new EDO is notation. How do you even write this stuff down?
In 29-edo, sharps and flats still exist — but a sharp raises by 3 steps (about 124 cents) rather than the 5 steps (100 cents) of 12-edo. This means that the chromatic scale looks a bit unusual. C-sharp and D-flat are no longer enharmonically equivalent — there's a 41-cent gap between them. The same is true of all six pairs of traditional "same-note" sharps and flats.
C♯ ≠ D♭. E♯ ≠ F♭. B♯ ≠ C♭. And so on.
This can feel disorienting at first, but it's actually very consistent once you internalize it. The seven natural notes (C D E F G A B) work exactly as they always have. It's the accidentals that expand.
For finer notation, many 29-edo composers use an "ups and downs" system, where a small arrow (^ for "up" and v for "down") raises or lowers a note by one step. So "C up" (^C) is one step above C, and "D-flat down" (vD♭) is one step below D♭. This system was developed specifically for EDOs where sharps and flats become awkward, and it works elegantly for 29.
You can read more about ups and downs notation on the Xenharmonic Wiki.
One of the biggest practical concerns when approaching a new EDO is notation. How do you even write this stuff down?
In 29-edo, sharps and flats still exist — but a sharp raises by 3 steps (about 124 cents) rather than the 5 steps (100 cents) of 12-edo. This means that the chromatic scale looks a bit unusual. C-sharp and D-flat are no longer enharmonically equivalent — there's a 41-cent gap between them. The same is true of all six pairs of traditional "same-note" sharps and flats.
C♯ ≠ D♭. E♯ ≠ F♭. B♯ ≠ C♭. And so on.
This can feel disorienting at first, but it's actually very consistent once you internalize it. The seven natural notes (C D E F G A B) work exactly as they always have. It's the accidentals that expand.
For finer notation, many 29-edo composers use an "ups and downs" system, where a small arrow (^ for "up" and v for "down") raises or lowers a note by one step. So "C up" (^C) is one step above C, and "D-flat down" (vD♭) is one step below D♭. This system was developed specifically for EDOs where sharps and flats become awkward, and it works elegantly for 29.
You can read more about ups and downs notation on the Xenharmonic Wiki.
Scales in 29edo: Familiar and Unfamiliar
The Diatonic Scale Still Works
The major and natural minor scales exist in 29-edo just as in 12-edo, and they function almost identically. The step sizes are L = 5 steps (a "large" step, ~206 cents) and s = 2 steps (a "small" step, ~82 cents), giving the familiar LLSLLLS pattern in major. Melodies and chord progressions you know will still work. The sound is very slightly different — especially the thirds — but recognizably diatonic.
This scale family is called 5L 2s in the xenharmonic world, where the L and s refer to the two step sizes. You'll be right at home here.
The major and natural minor scales exist in 29-edo just as in 12-edo, and they function almost identically. The step sizes are L = 5 steps (a "large" step, ~206 cents) and s = 2 steps (a "small" step, ~82 cents), giving the familiar LLSLLLS pattern in major. Melodies and chord progressions you know will still work. The sound is very slightly different — especially the thirds — but recognizably diatonic.
This scale family is called 5L 2s in the xenharmonic world, where the L and s refer to the two step sizes. You'll be right at home here.
The Harmonic Minor Gets Interesting
Here's one of the places where 29-edo starts to diverge interestingly from 12-edo. In 12-edo, the harmonic minor scale has an augmented second between the sixth and seventh scale degrees — that characteristic gap of 3 semitones that gives harmonic minor its dramatic quality.
In 29-edo, that augmented second is 8 steps (~331 cents) while the minor third is 7 steps (~289 cents). These are clearly different intervals, whereas in 12-edo they're very close (300 cents vs. 300 cents — in 12-edo, they're actually the same size! The "augmented second" and "minor third" in 12-edo are enharmonically identical).
This opens the door to the 4L 3s scale, which distributes the harmonic minor's step sizes more evenly and creates a new family of seven modes with their own character. The mode names given by theorist Ayceman include names like "Vivecan" (analogous to Harmonic Minor), "Nerevarine" (analogous to Major Augmented), and "Dagothic" (analogous to Phrygian Dominant). These are playful names, but they usefully convey the flavor of each mode relative to something familiar.
Here's one of the places where 29-edo starts to diverge interestingly from 12-edo. In 12-edo, the harmonic minor scale has an augmented second between the sixth and seventh scale degrees — that characteristic gap of 3 semitones that gives harmonic minor its dramatic quality.
In 29-edo, that augmented second is 8 steps (~331 cents) while the minor third is 7 steps (~289 cents). These are clearly different intervals, whereas in 12-edo they're very close (300 cents vs. 300 cents — in 12-edo, they're actually the same size! The "augmented second" and "minor third" in 12-edo are enharmonically identical).
This opens the door to the 4L 3s scale, which distributes the harmonic minor's step sizes more evenly and creates a new family of seven modes with their own character. The mode names given by theorist Ayceman include names like "Vivecan" (analogous to Harmonic Minor), "Nerevarine" (analogous to Major Augmented), and "Dagothic" (analogous to Phrygian Dominant). These are playful names, but they usefully convey the flavor of each mode relative to something familiar.
A Diminished Scale With Six Modes
In 12-edo, the octatonic (diminished) scale has only two distinct modes because of its symmetrical construction. In 29-edo, the chain of minor thirds never quite closes — four minor thirds (7 × 4 = 28 steps) fall one step short of the octave — so instead of perfect symmetry, you get a 4L 5s scale with nine notes and nine distinct modes. Each mode has its own unique flavor, named by theorist Lilly Flores after geographic features in Greek — Roi, Steno, Limni, Telma, Krini, Elos, Mychos, Akti, and Dini.
In 12-edo, the octatonic (diminished) scale has only two distinct modes because of its symmetrical construction. In 29-edo, the chain of minor thirds never quite closes — four minor thirds (7 × 4 = 28 steps) fall one step short of the octave — so instead of perfect symmetry, you get a 4L 5s scale with nine notes and nine distinct modes. Each mode has its own unique flavor, named by theorist Lilly Flores after geographic features in Greek — Roi, Steno, Limni, Telma, Krini, Elos, Mychos, Akti, and Dini.
The Whole Tone Scale With Six Modes
Similarly, in 12-edo the whole tone scale has only one mode (since it's completely symmetrical). In 29-edo, five whole tones add up to 25 steps — one step short of the octave. The sixth interval needs to be a slightly smaller "diminished third" to complete the octave. This produces a 5L 1s scale with six distinct modes, named by Lilly Flores as Erev, Oplen, Layla, Shemesh, Boqer, and Tsohorayim.
Similarly, in 12-edo the whole tone scale has only one mode (since it's completely symmetrical). In 29-edo, five whole tones add up to 25 steps — one step short of the octave. The sixth interval needs to be a slightly smaller "diminished third" to complete the octave. This produces a 5L 1s scale with six distinct modes, named by Lilly Flores as Erev, Oplen, Layla, Shemesh, Boqer, and Tsohorayim.
Neutral Scales
One of the most exotic scale families available in 29-edo uses neither perfect fifths nor major/minor thirds as its generator, but instead a "neutral third" — the interval sitting right between a major and minor third. This creates the 3L 4s scale, which sounds genuinely alien compared to anything in 12-edo. The modes, named by Andrew Heathwaite, each combine the flavors of two diatonic modes.
One of the most exotic scale families available in 29-edo uses neither perfect fifths nor major/minor thirds as its generator, but instead a "neutral third" — the interval sitting right between a major and minor third. This creates the 3L 4s scale, which sounds genuinely alien compared to anything in 12-edo. The modes, named by Andrew Heathwaite, each combine the flavors of two diatonic modes.
The “Nicetone” System: Almost Meantone
One of the most intriguing concepts in 29-edo is what composer and theorist Budjarn Lambeth (one of the most active 29-edo advocates) calls “Nicetone” — a play on the word “meantone.”
Standard 12-edo and meantone systems use a slightly flat fifth to make the major third work out cleanly. Nicetone uses a different strategy: it accepts 29-edo’s sharp fifth and its darker-than-12-edo major third, but compensates by using what’s called a “superfourth” (~537 cents, one step wider than a perfect fourth) as a consonant interval in certain chords and voice-leading contexts.
The result is a diatonic-like system with a very similar harmonic structure to meantone — most of your familiar chord progressions work — but with noticeably different shading. It’s described as “only slightly xenharmonic,” making it a practical path for musicians who want to use 29-edo for mostly conventional-sounding music with a few surprising new colors.
The Nicetone major scale pattern in 29-edo is 5 4 3 5 4 5 3 — notice how this slightly reshuffles the sizes of the major scale’s steps compared to the standard 5 5 2 5 5 5 2.
One of the most intriguing concepts in 29-edo is what composer and theorist Budjarn Lambeth (one of the most active 29-edo advocates) calls “Nicetone” — a play on the word “meantone.”
Standard 12-edo and meantone systems use a slightly flat fifth to make the major third work out cleanly. Nicetone uses a different strategy: it accepts 29-edo’s sharp fifth and its darker-than-12-edo major third, but compensates by using what’s called a “superfourth” (~537 cents, one step wider than a perfect fourth) as a consonant interval in certain chords and voice-leading contexts.
The result is a diatonic-like system with a very similar harmonic structure to meantone — most of your familiar chord progressions work — but with noticeably different shading. It’s described as “only slightly xenharmonic,” making it a practical path for musicians who want to use 29-edo for mostly conventional-sounding music with a few surprising new colors.
The Nicetone major scale pattern in 29-edo is 5 4 3 5 4 5 3 — notice how this slightly reshuffles the sizes of the major scale’s steps compared to the standard 5 5 2 5 5 5 2.
Chords in 29edo: A Broader Palette
Because 29-edo preserves the perfect fifth and the diatonic framework, all the familiar tertian triads are still present: major, minor, diminished, augmented. But because the major and minor thirds come in more varieties, the chord palette expands dramatically.
Some of the new chord types you gain:
Tendo chord — Uses a “upmajor third” (^M3, one step wider than a major third). Sounds like a major chord that’s been stretched slightly. Good for exotic color while still sounding vaguely consonant.
Arto chord — Uses a “downminor third” (vm3, one step narrower than a minor third). Sounds like a compressed, darker version of a minor chord.
Upminor and Downmajor — Chords where the third is one step above or below the standard minor or major third, respectively. These create chords that hover between major and minor in quality.
Chthonic triads — Built from two chthonic thirds stacking up to a perfect fourth (instead of the usual stacking of thirds up to a fifth). These have a completely different quality from conventional triads — hollow, ambiguous, and highly characteristic of 29-edo.
You can explore the full chord system at Unque’s compositional approach page, which catalogs dozens of chord types with notation.
Because 29-edo preserves the perfect fifth and the diatonic framework, all the familiar tertian triads are still present: major, minor, diminished, augmented. But because the major and minor thirds come in more varieties, the chord palette expands dramatically.
Some of the new chord types you gain:
Tendo chord — Uses a “upmajor third” (^M3, one step wider than a major third). Sounds like a major chord that’s been stretched slightly. Good for exotic color while still sounding vaguely consonant.
Arto chord — Uses a “downminor third” (vm3, one step narrower than a minor third). Sounds like a compressed, darker version of a minor chord.
Upminor and Downmajor — Chords where the third is one step above or below the standard minor or major third, respectively. These create chords that hover between major and minor in quality.
Chthonic triads — Built from two chthonic thirds stacking up to a perfect fourth (instead of the usual stacking of thirds up to a fifth). These have a completely different quality from conventional triads — hollow, ambiguous, and highly characteristic of 29-edo.
You can explore the full chord system at Unque’s compositional approach page, which catalogs dozens of chord types with notation.
Functional Harmony Still Works
One of the most reassuring things about 29-edo for musicians coming from standard theory is that functional harmony — the system of tensions and resolutions that underpins almost all Western music — still applies.
The dominant-to-tonic resolution still functions. The circle of fifths still works. Leading tones still pull toward their targets. Voice leading still makes sense.
In fact, 29-edo gives you not one but three distinct leading tone intervals: the diesis (1 step, ~41 cents), the minor second (2 steps, ~82 cents), and the chroma (3 steps, ~124 cents). The minor second (equivalent in size to the standard 12-edo semitone) remains the strongest leading tone and behaves just as you’d expect. The diesis acts more like a chromatic inflection than a melodic step, and the chroma sounds like a relatively wide half step.
This means you can construct convincing dominant-tonic progressions in almost any scale 29-edo offers, with the same basic logic you learned studying common-practice voice leading.
One of the most reassuring things about 29-edo for musicians coming from standard theory is that functional harmony — the system of tensions and resolutions that underpins almost all Western music — still applies.
The dominant-to-tonic resolution still functions. The circle of fifths still works. Leading tones still pull toward their targets. Voice leading still makes sense.
In fact, 29-edo gives you not one but three distinct leading tone intervals: the diesis (1 step, ~41 cents), the minor second (2 steps, ~82 cents), and the chroma (3 steps, ~124 cents). The minor second (equivalent in size to the standard 12-edo semitone) remains the strongest leading tone and behaves just as you’d expect. The diesis acts more like a chromatic inflection than a melodic step, and the chroma sounds like a relatively wide half step.
This means you can construct convincing dominant-tonic progressions in almost any scale 29-edo offers, with the same basic logic you learned studying common-practice voice leading.
Real Music in 29edo
If all this theory sounds abstract, it helps to know that there’s a growing body of real music being made in 29-edo. Here are some composers and pieces worth checking out:
Bryan Deister has made an extensive catalog of microtonal covers in 29-edo, including arrangements of Kate Bush, King Crimson, Deltarune music, and C418’s work from Minecraft. These are a great starting point because you can hear a familiar song reimagined in the new tuning system, which makes the difference in color immediately audible.
Francium has released multiple 29-edo albums on Spotify and Bandcamp, including tracks from the album Melancholieand the collection XenRhythms. These range from ambient to melodic and are relatively accessible.
Igliashon Jones composed several early 29-edo pieces including Nautilus Reverie and Howling of the Holy, which explore the Nautilus[14] scale discussed below.
Claudi Meneghin has rendered several Bach pieces — including movements from the Art of Fugue and the Musical Offering — in 29-edo, which is one of the most interesting ways to hear how the tuning interacts with familiar contrapuntal material.
You can find more at the 29-edo page on the Xenharmonic Wiki.
If all this theory sounds abstract, it helps to know that there’s a growing body of real music being made in 29-edo. Here are some composers and pieces worth checking out:
Bryan Deister has made an extensive catalog of microtonal covers in 29-edo, including arrangements of Kate Bush, King Crimson, Deltarune music, and C418’s work from Minecraft. These are a great starting point because you can hear a familiar song reimagined in the new tuning system, which makes the difference in color immediately audible.
Francium has released multiple 29-edo albums on Spotify and Bandcamp, including tracks from the album Melancholieand the collection XenRhythms. These range from ambient to melodic and are relatively accessible.
Igliashon Jones composed several early 29-edo pieces including Nautilus Reverie and Howling of the Holy, which explore the Nautilus[14] scale discussed below.
Claudi Meneghin has rendered several Bach pieces — including movements from the Art of Fugue and the Musical Offering — in 29-edo, which is one of the most interesting ways to hear how the tuning interacts with familiar contrapuntal material.
You can find more at the 29-edo page on the Xenharmonic Wiki.
The Nautilus Scale: 29edo’s Signature Sound
If 29-edo has a calling card, it might be the Nautilus[14] scale — a 14-note scale generated by stacking intervals of 2 steps (~82 cents) on top of each other. This is the system most closely associated with 29-edo and it doesn’t have a clean parallel in 12-edo.
The Nautilus[14] scale contains two distinct types of tetrads (four-note chords):
- “Even” tetrads approximating the 4:5:6:7 chord (a dominant seventh chord in just intonation — the sound blues and jazz musicians naturally gravitate toward when they sing freely)
- “Odd” tetrads approximating the “Bohlen-Pierce-like” chord 9:11:13:15, which has a more spacious, ambiguous quality
Both types of chords can be built on every scale degree of Nautilus[14], making it a “circulating” scale with maximum freedom of modulation — analogous to the way 12-edo’s equal temperament allows you to modulate to any key.
This is the Nautilus temperament in action, and it’s one of the most compositionally powerful features of 29-edo.
If 29-edo has a calling card, it might be the Nautilus[14] scale — a 14-note scale generated by stacking intervals of 2 steps (~82 cents) on top of each other. This is the system most closely associated with 29-edo and it doesn’t have a clean parallel in 12-edo.
The Nautilus[14] scale contains two distinct types of tetrads (four-note chords):
- “Even” tetrads approximating the 4:5:6:7 chord (a dominant seventh chord in just intonation — the sound blues and jazz musicians naturally gravitate toward when they sing freely)
- “Odd” tetrads approximating the “Bohlen-Pierce-like” chord 9:11:13:15, which has a more spacious, ambiguous quality
Both types of chords can be built on every scale degree of Nautilus[14], making it a “circulating” scale with maximum freedom of modulation — analogous to the way 12-edo’s equal temperament allows you to modulate to any key.
This is the Nautilus temperament in action, and it’s one of the most compositionally powerful features of 29-edo.
Getting Started: Practical Tips
Software: The easiest way to experiment with 29-edo is through a DAW that supports microtuning. Bitwig Studio has built-in EDO support. Ableton Live can use MIDI pitch bend mapping. Plugins like Surge XT support Scala tuning files natively. You can download a 29-edo Scala (.scl) file from the Xenharmonic Wiki’s scale archive.
Start familiar: Begin by playing music you already know — simple melodies, scales, chord progressions — in 29-edo. The slight differences in the thirds and the new leading tone sizes will become apparent quickly, and you’ll start to hear what’s familiar versus what’s genuinely new.
Explore the diatonic modes first: The Ionian, Dorian, Phrygian, etc. all exist in 29-edo and behave similarly to their 12-edo counterparts. Once you’re comfortable there, try the 4L 3s modes, which offer the most interesting departure point.
Try voice leading with the new leading tones: Write a short chorale or progression and experiment with approaching resolutions by a diesis (one step) instead of a semitone. It creates a strikingly different sense of tension and release.
Listen to microtonal music broadly: Developing your ear for non-12 tunings takes time. Regular listening to music in 19-edo, 22-edo, 31-edo, and 29-edo will build familiarity faster than any amount of theoretical study.
Software: The easiest way to experiment with 29-edo is through a DAW that supports microtuning. Bitwig Studio has built-in EDO support. Ableton Live can use MIDI pitch bend mapping. Plugins like Surge XT support Scala tuning files natively. You can download a 29-edo Scala (.scl) file from the Xenharmonic Wiki’s scale archive.
Start familiar: Begin by playing music you already know — simple melodies, scales, chord progressions — in 29-edo. The slight differences in the thirds and the new leading tone sizes will become apparent quickly, and you’ll start to hear what’s familiar versus what’s genuinely new.
Explore the diatonic modes first: The Ionian, Dorian, Phrygian, etc. all exist in 29-edo and behave similarly to their 12-edo counterparts. Once you’re comfortable there, try the 4L 3s modes, which offer the most interesting departure point.
Try voice leading with the new leading tones: Write a short chorale or progression and experiment with approaching resolutions by a diesis (one step) instead of a semitone. It creates a strikingly different sense of tension and release.
Listen to microtonal music broadly: Developing your ear for non-12 tunings takes time. Regular listening to music in 19-edo, 22-edo, 31-edo, and 29-edo will build familiarity faster than any amount of theoretical study.
Why 29edo and Not 31edo or 19edo?
The most popular “beginner” microtonal EDOs are usually 19-edo and 31-edo, both of which are meantone systems — meaning they share most of 12-edo’s harmonic logic but with better major thirds. They’re excellent systems and worth exploring.
But 29-edo offers something those systems don’t: a genuinely different harmonic direction. Because its fifth is sharprather than flat, it introduces a whole family of sounds — the darker major thirds, the higher-limit intervals, the Nautilus scale — that can’t be found in meantone territory. It’s also the smallest EDO that consistently handles the full 15-odd-limit, meaning it approximates a wide range of harmonic ratios without internal contradiction.
If 19-edo and 31-edo are meantone dialects of 12-edo’s language, 29-edo is an entirely different language — one that happens to share a lot of the same grammar.
The most popular “beginner” microtonal EDOs are usually 19-edo and 31-edo, both of which are meantone systems — meaning they share most of 12-edo’s harmonic logic but with better major thirds. They’re excellent systems and worth exploring.
But 29-edo offers something those systems don’t: a genuinely different harmonic direction. Because its fifth is sharprather than flat, it introduces a whole family of sounds — the darker major thirds, the higher-limit intervals, the Nautilus scale — that can’t be found in meantone territory. It’s also the smallest EDO that consistently handles the full 15-odd-limit, meaning it approximates a wide range of harmonic ratios without internal contradiction.
If 19-edo and 31-edo are meantone dialects of 12-edo’s language, 29-edo is an entirely different language — one that happens to share a lot of the same grammar.
A Final Word
29-edo is one of those tuning systems that rewards curiosity. It won’t immediately feel comfortable — the thirds take some getting used to, and some of the new intervals require genuine ear training to appreciate. But it preserves enough of the scaffolding of standard music theory that you’re never totally lost, and the new sounds it opens up are genuinely unlike anything available in 12-edo.
The microtonal community has a tendency to be either deeply mathematical or deeply esoteric. 29-edo, especially via resources like Unque’s compositional guide, offers a more practical on-ramp: here are your intervals, here are your chords, here are your scales, here’s how voice leading works. That kind of structured theory is something musicians who’ve spent years learning standard harmony will find immediately useful.
Give it a listen. Give it a play. The grid just got finer — and there’s a lot of new territory to map.
29-edo is one of those tuning systems that rewards curiosity. It won’t immediately feel comfortable — the thirds take some getting used to, and some of the new intervals require genuine ear training to appreciate. But it preserves enough of the scaffolding of standard music theory that you’re never totally lost, and the new sounds it opens up are genuinely unlike anything available in 12-edo.
The microtonal community has a tendency to be either deeply mathematical or deeply esoteric. 29-edo, especially via resources like Unque’s compositional guide, offers a more practical on-ramp: here are your intervals, here are your chords, here are your scales, here’s how voice leading works. That kind of structured theory is something musicians who’ve spent years learning standard harmony will find immediately useful.
Give it a listen. Give it a play. The grid just got finer — and there’s a lot of new territory to map.
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