FORMAT DECISION

Best Audio Format for MIDI Conversion

Use the cleanest original file you already have. Do not turn an MP3 into WAV and expect missing audio detail to return. If your browser cannot decode the original, use a standard PCM WAV exported from the original recording or project as the compatibility fallback.

WAV: practical compatibility fallback
MP3: convenient when it is your only source
M4A: common for phone recordings
FLAC or OGG: use directly when this browser decodes it

Decision map for choosing WAV, MP3, M4A, FLAC, or OGG before audio-to-MIDI conversion — Keep the original when it opens. Change format only to solve a real decoding problem.

CONVERT LOCALLY

Test the file in this browser

Choose one supported audio file. Nothing is uploaded.

INPUT MP3 / WAV / M4A / FLAC / OGG → OUTPUT .MID

Drop one audio file here

or click to choose audio from your device

Choose audioMP3, WAV, M4A, FLAC, or OGG · one file · up to 50 MB / 5 minutes

Or record a short melody instead of choosing a file.

Your audio stays on your device. All processing happens in this browser. No file is uploaded to a server.

No sign-upOne file at a timeNo watermark

Starting file	Use it directly when	Change format only when	What not to assume
WAV	The browser decodes it and it is within the visible limits.	A WAV encoding is unsupported; export standard PCM WAV from the original source.	A WAV extension alone does not prove the recording is cleaner.
MP3	It is the cleanest original available and opens successfully.	The browser reports a decode error and you still have the original project or recording.	Saving the MP3 as WAV cannot restore audio already removed by compression.
M4A	A phone memo or export opens in the current browser.	The current browser cannot decode that specific file.	The same extension does not guarantee identical encoding in every file.
FLAC	The browser decodes it without an error.	Compatibility blocks the file; export from the original source to PCM WAV.	Lossless storage does not remove noise, reverb, chords, or overlapping instruments.
OGG	The browser decodes the selected file.	The file fails to open in the current browser.	Changing the container does not simplify a dense musical mix.

Troubleshooting path for an audio file that a browser cannot decode — A file extension is only the first clue. The browser's actual decode result decides the next step.

ORIGINAL FIRST

Avoid unnecessary transcoding

If the original opens, use it. A new container or extension does not make a noisy recording clearer, separate instruments, or restore detail removed from an earlier lossy copy.

COMPATIBILITY

Use PCM WAV as the fallback

If a supported extension still fails to decode, return to the original recording or project and export a standard PCM WAV. Renaming the extension is not a conversion.

SOURCE QUALITY

Format does not fix a busy mix

The detector follows one dominant pitch at a time. A clean solo melody is a simpler input than drums, chords, room echo, and overlapping instruments in any file format.

VISIBLE LIMITS

Check size and duration first

This page accepts one file at a time, up to 50 MB and 5 minutes. A shorter excerpt also makes it easier to inspect the note preview before downloading.

QUICK ANSWERS

Audio format questions

Can you convert a WAV file to MIDI?

Yes. Choose the WAV above, let the browser decode it, preview the detected note events, and download the `.mid` file.

Is an online WAV to MIDI converter different from this page?

This page runs the conversion in your browser and does not upload the audio. “Online” describes access through a webpage; it does not require server-side file processing.

Should I convert MP3 to WAV before MIDI?

Not when the MP3 already opens. Converting that MP3 to WAV changes storage format but cannot restore detail missing from the MP3 source.

Why can a supported format still fail?

The extension may contain an encoding that the current browser cannot decode. Try the original in another supported browser, or export standard PCM WAV from the original recording or project.

What if the file opens but the notes look wrong?

That is a detection problem rather than a format error. Use the result troubleshooting guide and change one control at a time.

Download the audio format decision table (.csv)