MIDI Extractor
Extract a basic MIDI note sequence from monophonic audio. Best for whistled melodies and single instruments.
Drop your audio file here
or click to browse a file
Best with clean monophonic audio: whistled melodies, single-instrument lines.
About this MIDI extractor
This tool runs pitch detection over short windows of your audio, quantises each frame to the nearest MIDI note, then groups consecutive same-note frames into MIDI note events. Output is a standard .mid file that opens in any DAW or notation software.
Works best on clean monophonic audio — whistled melodies, single saxophone notes, vocal lines without harmonies, isolated piano single-note runs. Polyphonic audio (chords, full songs) produces noisy, unreliable results — that needs proper multi-pitch detection which is beyond what this lightweight tool does.
How to extract MIDI from audio
- 01
Drop in monophonic audio
WAV / MP3 / FLAC of a single note source — whistle, single instrument, vocal line.
- 02
Wait for analysis
Tool decodes audio, runs pitch detection per ~50 ms window, groups same-note runs.
- 03
Download the .mid
Standard MIDI file — open in your DAW or any notation tool.
Why use this MIDI extractor
- Reliable pitch detection on clean monophonic content
- Outputs standard .mid file
- Configurable note quantisation
- Free, private, no install
- No watermark, no signup
- Useful for transcribing whistled melodies or single-instrument hooks
MIDI extractor FAQ
What does 'monophonic' mean?
Only one note playing at a time. A whistled melody is monophonic. A piano chord is polyphonic. The tool can only detect one pitch per moment.
Will it work on a full song?
Not well. Polyphonic detection is a research-level problem — there are paid services (Bytedance Spectrogram-to-MIDI, Spotify's Basic Pitch) that do it better.
What's the pitch range?
Detector targets 80 Hz to 1500 Hz — that covers vocals, whistles, most monophonic instrument leads. Bass guitar lines work; piccolo flutes won't.
Is my file kept private?
Yes. We don't analyse or index your audio beyond returning the MIDI result.
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