Drop in a monophonic sample — bass, lead, voice, guitar or synth — and ToneAnvil tracks its pitch, turns it into editable MIDI notes and exports a DAW-ready MIDI file.
LIVE · BROWSER LOCAL
TA-13 / AUDIO → MIDI
Monophonic Audio → MIDI
Audio in. Editable notes out. Everything runs locally in your browser.
LOCAL
DROP MONOPHONIC AUDIO HERE
WAV, MP3, M4A, AAC, OGG and other formats your browser can decode. Best results: one note at a time, minimal reverb and little background noise.
LOCAL ANALYSIS · YOUR AUDIO DOES NOT LEAVE THE BROWSER
SOURCE AUDIO—
DURATION—
SOURCE RATE—
CHANNELS—
WAVEFORM + PITCH TRACE—
EDITABLE PIANO ROLL—
DIRECT NOTE EDITDrag note vertically = pitch · drag body horizontally = start · drag right edge = duration · click = select
SELECTED NOTE—
Click a detected note in the piano roll to edit it.
DETECTED NOTES0
PITCH SPAN—
AVG CONFIDENCE—
VOICED AUDIO—
How ToneAnvil converts monophonic audio
The browser decodes the file locally, mixes it to mono, downsamples it for analysis and runs a YIN-style fundamental-frequency tracker over short overlapping frames. Stable pitch frames are grouped into MIDI notes, short glitches are removed, repeated notes can be merged and the resulting notes remain editable before export.
Where pitch tracking can fail
This works best with one pitched source at a time. Chords, heavy distortion, strong reverb, octave-rich transients, noisy recordings and very fast slides can create wrong or octave-shifted detections. The editable piano roll is there so you can correct those cases before exporting.
Expressive MIDI mode
Expressive mode writes pitch-bend data around each detected note and sets a ±2-semitone pitch-bend range at the start of the MIDI track. Clean Notes rounds the performance to discrete MIDI pitches, which is usually better when the goal is replacing the original sound.