◱TEMPO
BPM to Milliseconds
Quarter
1/8 dotted
1/16 Hz
⚌Tempo Control
BPM
20 · Slow400 · Fast
Space
▦Subdivision Matrix
Straight = 60000 / BPM × 4/N · Dotted × 1.5 · Triplet × 2/3 · click a value to copy
◌RHYTHM
Euclidean Rhythms
Pattern
Step
Cycle
◌Pattern Wheel
⚌Pattern Controls
Steps (n)
Pulses (k)
Rotation
STEP LENGTH
E(k, n) spreads k hits as evenly as possible across n steps · Tresillo = E(3,8) · Bembé = E(7,12)
≋SPACE
Reverb & Delay Times
Bar
Beat
Pre 1/64
⚌Tempo Control
BPM
20 · Slow400 · Fast
Space
≋Reverb Times
⚌Custom Space
TOTAL LENGTH
bars
PRE-DELAY NOTE
of a bar
Pre-delay
Decay
Total
⟳Delay Quick Picks
Slapback: 60–120 ms, not tempo-synced · dotted echoes groove against the grid
bar = 240000 / BPM · pre-delay = bar / N · decay = total − pre-delay · click a value to copy
▤PITCH
Note Frequencies
A4
C4
A3
🎻Concert Pitch
A4 tuning · Hz
400 Hz480 Hz
∿Frequency Matrix
f = A4 × 2^((n − 69) / 12) · C4 = middle C · A4 highlighted · click a value to copy
∿OVERTONES
Harmonic Series
f₀
3×
5×
🎻Fundamental
▮▮Spectrum · click a bar to toggle & audition
Bar height = 1/n (sawtooth amplitude) · cents show the drift from 12-TET: green = in tune, amber = noticeable, red = far off the grid · right-click a bar to copy its Hz
fₙ = n × f₀ · 4:5:6 = major triad · 7× lands 31¢ flat of the grid — the “blue” seventh
◉HARMONY
Circle of Fifths
Key
Signature
Relative
◉Key Wheel
♪Key Details
SCALE
DIATONIC CHORDS · click to play & add · right-click to copy
Relative
Dominant
Subdominant
▶Progression Player
Clockwise = +1♯ (dominant) · Counter-clockwise = +1♭ (subdominant) · Inner ring = relative minor