WAV and FLAC keep the full source
Use them when you control the recording or export. FLAC is smaller without throwing away musical information; WAV has the widest editing compatibility.
In-browser · private · no upload
Audio to MIDI Converter
Convert MP3, WAV, OGG, FLAC, M4A, AAC or WebM audio into editable MIDI notes locally in your browser.
Drop an audio file here
MP3, WAV, OGG, FLAC, M4A · up to 10 minutes · 3 minutes on mobile
Or try a sample:
Use one private converter for seven common audio formats
Audio to MIDI is a category, not a single file type. Tonera accepts MP3, WAV, FLAC, M4A, OGG, AAC and WebM, then lets the browser decode the source before Basic Pitch estimates pitch, onset, duration and velocity.
Standard processing stays on your device. The best format is normally the closest copy to the recording or mix—not a file that has been converted several times just to match an upload box.
MP3, M4A, AAC and OGG travel well
Compressed formats are convenient and often transcribe well when the melody is clear. Repeated encoding and low bitrates can soften attacks.
WebM works without a detour
Recordings produced by browsers can stay in WebM. There is no benefit in converting to MP3 before transcription.
Which audio format should you use?
Choose the original or highest-quality copy you already have. File extensions do not rescue a noisy arrangement, and unnecessary conversion can only preserve or reduce quality—not improve it.
WAV and FLAC
WAV stores uncompressed samples and is a dependable choice for DAW bounces and field recordings. FLAC compresses those samples without losing them, so it is ideal when you want smaller files with the same underlying audio.
Both are good inputs for exposed attacks and quiet notes. Very high sample rates do not automatically improve transcription because the model receives a 22,050 Hz mono representation. Recording quality and isolation matter more.
MP3, M4A/AAC and OGG
These formats remove or reshape information to save space. They are practical for music libraries, phone exports and downloads, and a clean lead line can still produce useful MIDI.
Use the least-compressed version available. Avoid converting one lossy format into another; a new extension does not restore the original transients.
WebM and browser recordings
WebM is common for microphone capture in modern browsers. Tonera can decode it directly, which avoids an extra export. If a browser cannot decode a particular codec variant, export WAV from the recording app or try a current Chrome, Edge or Safari release.
When formats are not the real problem
A pristine file can still produce tangled notes when several instruments share the same range. For complete songs, isolate the vocal, bass or other stem first. For solo material, tune the frequency range and minimum note duration before assuming the container is at fault.
Prepare, transcribe and export your audio
1
Upload the original source
Use the closest available copy instead of creating a new intermediate file.
2
Match cleanup to the material
Short percussive audio needs different thresholds from sustained piano, guitar or voice.
3
Send the result where it belongs
Export MIDI to a DAW, MusicXML to a score editor, PDF to print, or ABC and chords for lightweight sharing.
Browser decoding and model limits
Codec support varies slightly by browser, even when the extension is supported. The converter estimates pitched notes rather than stems, lyrics or drum transcription. Use a modern browser, keep files under ten minutes and choose one clear pitched source whenever possible.