FROM SOUND TO NOTES
Turn an MP3 or WAV melody into editable MIDI notes. Listen, make it yours and bring the .mid file into your music software.
Up to 25 MB and 5 minutes per file. On mobile, select an excerpt of up to 1 minute.
Lower sensitivity removes quieter notes. A longer minimum filters short false notes.
Recovering your MIDI result…
Convert a clear piano, guitar, bass or vocal melody. Then compare the notes with your original and make small edits.
This short piano-style melody was created for this example, then transcribed with the same local model. Listen to the recording and the detected notes. The MIDI preview uses a different synth sound; the notes and timing are what matter.
Choose an MP3 or WAV file from your device, then select the part you want to transcribe. Convert it locally, listen to the MIDI preview and compare it with the original audio. Adjust a note’s pitch, timing or velocity before downloading the .mid file for your music software.
Start with a clear single-instrument recording: a piano phrase, a guitar melody, a bass line or a solo vocal. Basic Pitch can detect overlapping pitched notes, but drums, reverb and a full mixed song can introduce extra or missing notes. MIDI records note instructions; it does not recreate the original recording or separate a song into instrument tracks.
The piano roll shows the detected notes. Select a note to change its pitch, start time, length or velocity, or remove a false note. Change the sensitivity to pick up quieter notes; increase the minimum note length to filter brief false detections. The preview uses a simple synth. Your downloaded MIDI keeps the edited notes so you can choose a richer instrument in your DAW.
Both formats use the same local transcription model. WAV is useful when you have an uncompressed recording, while MP3 is convenient for smaller files. Your browser downloads the small model only when you start converting. The audio and detected notes stay on your device; they are not uploaded to RapDuo or a generation provider.
Yes. Conversion, note editing, MIDI previews and .mid downloads are free. No account or credits are required. RapDuo’s separate AI music and video generation tools have their own credit prices.
Audio is a recording of sound. MIDI stores instructions such as note pitch, timing, length and velocity. Transcribing an MP3 to MIDI lets you edit those notes or play them with a different instrument. It does not preserve a singer’s voice or the original instrument tone.
You can select an excerpt, but a full mix with vocals, drums and several instruments is a difficult input. Rap speech and unpitched percussion are not a reliable source of melodic MIDI notes. For better results, use an isolated pitched melody and check the detected notes against the original.
Use an MP3 or WAV up to 25 MB and 5 minutes long. Desktop browsers can convert an excerpt of up to 5 minutes; mobile devices are limited to 1 minute per excerpt. Processing speed depends on your device. Try a shorter excerpt if conversion is slow.
No. Audio decoding and note detection run locally in your browser. The model and scripts are downloaded from RapDuo, but your audio is not sent back. The latest note result is saved locally when browser storage is available; clearing browser data removes it.
Import the .mid file into a DAW or notation app that supports standard MIDI. Choose an instrument there, check the notes and adjust tempo or notation as needed. The export uses one note track with a 120 BPM reference; note timing in seconds is preserved.
Noise, overlapping instruments, reverb and very quiet notes can confuse transcription. Try a cleaner recording or a shorter excerpt, adjust sensitivity and minimum note length, then edit the result. No audio to MIDI model guarantees perfect notes for every recording.
Local note detection uses Spotify’s open-source Basic Pitch model. MIDI exports use Tonejs MIDI. These projects are available under open-source licenses. Basic Pitch · Tonejs MIDI