TROUBLESHOOT THE RESULT

How to Fix MP3 to MIDI Conversion Problems

Extra quiet notes: raise Silence threshold. Tiny fragments: raise Minimum note. Missing low or high notes: widen Pitch range. Off-grid timing: match Tempo, then choose Quantize. Change one control at a time and use the preview to decide whether it helped.

TEST EACH CHANGE

Run the same file again

The result updates after you change a control. Your audio stays on this device.

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

Drop one audio file here

or click to choose audio from your device

Choose audio MP3, WAV, M4A, FLAC, or OGG · one file · up to 50 MB / 5 minutes

Or capture a clear melody with your microphone.

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

ONE VARIABLE

Use a controlled retry

Convert once with the current controls.
Write down the visible symptom, not a general quality judgment.
Change only the first control listed for that symptom.
Wait for the result to update and preview the notes.
Keep the change only if the named symptom improves.

SOURCE FIRST

Know when controls cannot solve it

This converter tracks a single dominant pitch at a time. A dense mix, overlapping chords, drums, heavy reverb, or background music can create unstable note events. If several parts overlap, retry with a clean solo melody or an isolated stem you are allowed to use.

SYMPTOM MATRIX

Which control should you change first?

What you see or hear	Change first	Direction	Stop when
Quiet background sounds become extra notes	Silence threshold	Raise it in small steps	The unwanted quiet notes disappear and the melody remains
Many tiny note fragments appear	Minimum note	Raise it	Fragments disappear without deleting intended short notes
Low melody notes are absent	Pitch range low	Lower it	The low notes return without adding rumble
High melody notes are absent	Pitch range high	Raise it	The high notes return without unstable overtones
Notes do not line up with the beat	Tempo, then Quantize	Match the source tempo; choose a suitable grid	The timing aligns without removing the feel you want
The performance sounds too rigid	Quantize	Turn it off or select a finer grid	The preview preserves the intended timing
No stable notes are detected	Silence threshold, then Pitch range	Lower the threshold; widen the range if needed	Stable melody notes appear in the preview

Download the troubleshooting checklist (.csv)

DETECTION

Threshold and pitch range decide what can become a note

The silence threshold filters by loudness. The pitch range filters by frequency. Tighten them to reject unwanted material; widen them when an intended note falls outside the current window.

TIMING

Minimum note and quantize solve different problems

Minimum note removes events that are too brief. Quantize moves accepted note timing to a musical grid. Use minimum note for fragments and quantize for alignment.

EXPORT

Preview before downloading

The piano roll shows where the browser found notes, while the audio preview lets you hear the detected pitches. Compare the same passage after each change before downloading the `.mid` file.

Start again with the main converter

Need the clean default setup? Open the MP3 to MIDI tool. You can also use the converter page or read how to change MP3 to MIDI.