SoundToMIDI review
A flexible free option for turning polyphonic audio into editable MIDI.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
SoundToMIDI is a browser-based audio-to-MIDI converter for musicians, producers, and composers who want editable notes from compatible audio. It performs polyphonic transcription locally on the user’s device, so files are not uploaded and an account is not required. Input support includes MP3, WAV, FLAC, M4A/AAC, OGG, MP4, and WebM. Voice, piano and guitar, bass, and general starting profiles help tailor transcription for different source material, while a short microphone recording mode supports clips up to 60 seconds.
The free Raw MIDI plan provides conversion and download at no cost, with no daily limit. Users can also adjust onset confidence, note confidence, minimum note length, and tempo before exporting. The result can be downloaded as MIDI or exported as a piano-roll image. For further refinement, the Cleaned MIDI option adds local note cleanup with melody, bass, piano, and grid cleanup modes. It offers a full preview before purchase and uses a one-time payment, making the product suitable for occasional conversion as well as repeat work that benefits from adjustable cleanup rather than a fixed automated result.
SoundToMIDI fits workflows built around Ableton Live, FL Studio, Logic Pro, GarageBand, Cubase, Reaper, or MuseScore, where exported MIDI can move into an existing music-production or notation setup. Its browser-only format keeps access straightforward, but it is less suitable for teams or producers who need batch processing, native applications, or a broader notation workflow inside the converter itself. Choose it for free local polyphonic transcription, configurable detection, and optional cleanup; choose an alternative if automated multi-file processing or native app support is central to the workflow.
SoundToMIDI pros and cons
- Where it wins
- Free, unlimited raw MIDI conversion with no account required
- Local polyphonic processing supports varied audio formats
- Adjustable detection controls and multiple instrument profiles
- Where it doesn't
- Cleaned MIDI downloads require a one-time purchase
- No batch processing for handling multiple files together
- Web-only access without native desktop or mobile apps
SoundToMIDI fact sheet, pricing and score →
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