Same recording, two downloadable MIDI files

MeluMimi vs Basic Pitch for piano audio to MIDI

This transparent test gives both converters the same authorized piano recording and publishes both unedited MIDI files. Listen, download, and inspect the differences before choosing a workflow.

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MP3

1. Listen to the shared source recording

Both outputs below come from this exact 15-second piano MP3. The recording is authorized for this public comparison.

Download source MP3

MIDI A/B

2. Listen to the two MIDI renderings

Both previews use the same neutral synthesizer. A different playback sound can change tone, but it cannot add or remove MIDI events.

MeluMimi output

The exact MIDI from the recorded MeluMimi run, without manual note replacement or cleanup.

Download MIDI · MeluMimi

Basic Pitch 0.4.0 output

Generated locally with Spotify Basic Pitch 0.4.0, its TensorFlow runtime, and official default prediction parameters.

Download MIDI · Basic Pitch 0.4.0

3. File facts from this one run

These values describe the files; they are not accuracy percentages. More notes can mean recovered notes or false positives, and fewer notes can mean cleaner output or missed notes.

Measurement	MeluMimi	Basic Pitch 0.4.0
Input	Same authorized 15-second MP3	Same authorized 15-second MP3
Manual correction	None	None
Note-on events	191	187
Distinct velocity values	54	56
CC64 sustain sections	4	0
MIDI note range	31–98	34–91
File event endpoint	14.987 seconds	14.918 seconds

Reproducible method

Use the same source file for both converters.
Keep each raw MIDI output without hand correction.
Record the converter version and prediction settings.
Hash and publish the source and outputs.
Use the same neutral synthesizer for listening previews.

Read the official Basic Pitch project and reproduce its run Read the piano MIDI accuracy comparison guide

Questions about this comparison

Does 191 versus 187 notes prove which converter is better?

No. Without synchronized ground truth, event counts alone cannot distinguish recovered notes from false or missed notes.

What does the CC64 difference mean?

The MeluMimi file in this run contains four sustain-pedal sections. The Basic Pitch 0.4.0 file in this run contains none.

Is Basic Pitch a general or piano-only converter?

Spotify describes Basic Pitch as instrument-agnostic and polyphonic, and says it works best on one instrument at a time.

Try your own piano recording