piano to midi converter

Piano to MIDI: convert one clear piano phrase locally

Q: Does this convert a full piano piece to MIDI?

No. MIDI Convert outputs one melody line at a time. First prepare the piano line you want to follow as a monophonic source, then convert it. It does not split left and right hands, transcribe chords, preserve sustain-pedal data, or build a complete piano arrangement.

This converter outputs one melody line at a time. First prepare the single piano line you want to follow, then convert that monophonic source to MIDI and check that its contour still follows the phrase you played.

Short answer: this is a single-line melody converter by design. Isolate or choose one audible piano line before conversion; it does not split a full piece into hands, chords, pedal data, or separate MIDI tracks.

Choose the right piano phrase

Start with one clearly audible note at a time. A short melody, right-hand lead, or single note line gives the pitch detector one line to follow. Five to fifteen seconds is enough to hear the opening, largest movement, repeated note, and first pause.

Do not use a complete piano arrangement as a chord-transcription test. Dense chords, left-hand accompaniment, pedal resonance, drums, vocals, room echo, and other instruments can make the detected line follow a different pitch than the melody you intended.

One-line design boundary

The detector makes one autocorrelation pitch estimate per analysis frame and groups those estimates into one note line. Its alternate Bass line setting only changes the analyzed frequency range; it is not a polyphonic or multi-note mode. Prepare the line you want to convert before using this page.

The shared controlled-source check uses 10 generated mono 44.1 kHz, 16-bit PCM WAV repetitions per condition; Balanced Melody / solo instrument mode; a 2048-sample window; a 1024-sample hop; and median reporting. A target is retained only when exactly one output overlaps it by at least 50% and is within 50 cents. Detector version SHA-256: DDA185AC8FB6A179A4FCFA73FD4197ACC95B8B6F59B233F5D3E330F596309F9F.

These are controlled synthetic source checks, not a general piano-transcription accuracy promise. They measure this single-line mode under the listed conditions only.

Check the MIDI before you edit it

Choose a short local MP3, WAV, M4A, FLAC, OGG, or another browser-decodable file containing the piano phrase.
Keep the converter in Melody / solo instrument mode and download the generated .mid file.
Open it in a piano roll and compare the opening, largest movement, repeated note, and first pause against the recording.

Keep a result when the broad note shape follows the piano melody. Correct a local timing, octave, or pitch mistake in a MIDI editor. Retry with a shorter, clearer phrase when the MIDI follows chord tones or another sound.

Can I convert piano to MIDI online?

Yes, for a short local recording with one clear piano note line. The converter above processes the file in your browser and produces an editable MIDI sketch you can inspect before deciding whether it is worth editing.

Does this convert a full piano piece to MIDI?

No. MIDI Convert outputs one melody line at a time. Prepare the piano line you want to follow as a monophonic source first. It does not split left and right hands, transcribe chords, preserve sustain-pedal data, or build a complete piano arrangement.

What piano recording works best for MIDI conversion?

Use a short dry melody with one clearly audible note at a time. A close, clean piano recording works better than a reverberant performance, dense chords, vocals, drums, or a full mix.