Audio to MIDI Converter

Use the Audio to MIDI Converter to turn a musical recording into an editable MIDI file that you can open in a DAW, MIDI editor, or notation workflow. Upload an audio file, let the converter detect musical notes and timing, review the transcription, then download the result as a .mid file.

The tool is most useful for relatively isolated musical parts such as piano, guitar, vocals, synth melodies, bass lines, and other pitched instruments. Audio-to-MIDI transcription is not the same as copying the original sound. Instead, it analyzes musical events such as pitch, note timing, and duration and represents those events as MIDI data that you can edit.

If you are working with a complete song and first need to understand its musical structure, tools such as the Song BPM Finder and Song Key Finder can help identify tempo and key before you begin editing the converted MIDI.

How to Use the Audio to MIDI Converter

The conversion process is designed to be straightforward.

1. Upload or drag your audio file into the converter.
2. Preview the recording to confirm that you selected the correct file.
3. Adjust note-detection sensitivity if needed.
4. Start the conversion.
5. Review the detected notes, note range, duration, and piano-roll preview.
6. Download the finished MIDI file.
7. Import the .mid file into your DAW or MIDI editor for further correction or arrangement.

For the cleanest results, start with a recording that contains one dominant pitched instrument or voice. A solo piano phrase, guitar riff, bass line, or vocal melody is generally easier to analyze than a finished stereo mix containing drums, vocals, guitars, synths, and effects at the same time.

What Audio-to-MIDI Conversion Actually Does

Audio and MIDI are fundamentally different formats.

An audio file such as MP3 or WAV contains a recorded sound waveform. MIDI does not contain that recorded sound. Instead, MIDI stores musical instructions and events.

A MIDI transcription can include information such as:

• note pitch,
• when each note begins,
• when each note ends,
• approximate note duration,
• note velocity,
• and pitch-bend information when detectable.

This difference is important because the resulting MIDI can be reassigned to another instrument.

For example, you might record a guitar melody, convert it to MIDI, then use the MIDI to play a piano, synthesizer, string library, or virtual instrument.

If you are building or rearranging a track, our Music Production Guide covers more of the decisions involved in moving from musical ideas to a finished production.

How Automatic Music Transcription Works

Audio-to-MIDI conversion requires more than identifying one frequency.

Real recordings can contain multiple notes at once, changing dynamics, vibrato, background noise, room reflections, harmonics, and effects. A transcription system must estimate when notes start, which pitches are present, how long they continue, and when they stop.

For polyphonic material such as piano chords, the system may need to detect several notes simultaneously.

The converter processes the audio and translates the detected note events into MIDI data. The resulting MIDI is intended to provide an editable transcription rather than a perfect recreation of the original performance.

This is why MIDI cleanup after conversion is normal. Small timing corrections, removing false notes, adjusting note lengths, quantizing events, or changing velocity can improve the final sequence.

Best Audio for Accurate MIDI Results

Source quality has a major effect on transcription quality.

For better results, use recordings with:

• one clear instrument or voice,
• minimal background noise,
• limited reverb,
• clear note attacks,
• consistent volume,
• little distortion,
• and minimal overlapping instruments.

A clean piano recording is usually easier to interpret than a dense full-band mix.

Likewise, a single vocal melody is easier to follow than layered harmonies mixed with drums and instruments.

Before converting a part from a song, it can also help to understand the musical key. The Music Key Chart provides a quick reference for notes and keys, while the Scale Finder can help you check whether detected notes fit the expected scale.

Converting Piano, Guitar, Vocals, and Melodies to MIDI

Different source types create different transcription challenges.

Piano to MIDI

Piano is a strong use case because individual notes and chords often have clear attacks. A clean piano recording can produce an editable representation of both melodies and harmonic parts.

Dense sustain-pedal passages may be harder because many notes overlap.

Guitar to MIDI

Single-note guitar melodies and riffs can convert well when the recording is clean.

Chords, heavy distortion, long sustain, string noise, bends, and effects can make the transcription more complex.

Vocal to MIDI

A clear sung melody can be converted into MIDI notes that you can use as a reference for synth lines, harmonies, notation, or production.

Natural vibrato, slides, breath noise, and pitch transitions may produce additional MIDI events that need cleanup.

Melody to MIDI

Simple monophonic melodies are usually among the easiest sources to work with because only one main note is active at a time.

After converting a melody, you can use the Song Transposer if you want to move the musical material into another key.

Why Full Songs Are Harder to Convert

A finished song contains many overlapping sound sources.

A typical mix may contain:

• lead vocals,
• backing vocals,
• drums,
• bass,
• guitars,
• keyboards,
• synths,
• effects,
• and ambient sounds.

The converter must distinguish pitched musical events from all of these overlapping frequencies.

Drums add another difficulty because percussion is not represented in the same way as normal pitched-note transcription.

For this reason, converting a complete commercial song to perfectly separated MIDI parts is not a realistic expectation for a general browser transcription tool.

If possible, use stems, isolated instrument tracks, or cleaner source material.

What Can You Do With the Converted MIDI?

Once you download the MIDI file, you can import it into compatible music software and continue working with the detected notes.

Common uses include:

• recreating a melody with a virtual instrument,
• editing note timing,
• quantizing a performance,
• changing the instrument sound,
• transposing the MIDI,
• creating harmony parts,
• extracting a rough notation reference,
• doubling an audio performance with a synth,
• studying the notes of a riff,
• or developing a recorded musical idea into a larger arrangement.

Tempo can become especially important once you start editing. Use the Tempo Calculator when you need tempo-related calculations, or read BPM in Music Production to understand how tempo affects arrangement and production decisions.

Audio vs MIDI

Here is the practical difference:

Audio	MIDI
Stores recorded sound	Stores musical note/event data
Includes the original tone	Does not preserve the original instrument sound
Common formats include WAV and MP3	Common file format is .mid
Harder to edit individual notes	Notes can usually be edited individually
Includes room sound and effects	Primarily represents performance instructions
Playback sounds like the recording	Playback depends on the selected MIDI instrument

This is why audio-to-MIDI conversion is especially useful for editing and reuse rather than sound preservation.

Accuracy and Limitations

Audio-to-MIDI transcription is an analytical process, so results can vary depending on the recording.

Potential causes of incorrect or extra notes include:

• multiple instruments playing simultaneously,
• heavy reverb,
• distortion,
• background noise,
• very fast passages,
• sustained overlapping notes,
• pitch bends,
• vibrato,
• poor recording quality,
• or percussion mixed with pitched instruments.

The generated MIDI should be treated as an editable transcription rather than a guaranteed note-for-note reconstruction.

You may need to remove false notes, correct octave errors, shorten or extend notes, adjust timing, or change velocities after importing the MIDI into your software.

For related theory work after conversion, Musical Keys Explained can help you understand how the detected notes relate to a song’s key.

Privacy and Browser Processing

The converter is designed to process your audio through the tool workflow rather than requiring you to manually send the recording to another service.

Your audio is used to perform the transcription and generate MIDI results. You should still avoid uploading sensitive recordings to any online tool unless you are comfortable processing them in your browser environment.

Large files can also require more processing power and memory. Shorter, cleaner musical phrases will normally provide a faster and more practical workflow.

Frequently Asked Questions

Can audio really be converted to MIDI?

Yes. Automatic music transcription can analyze an audio recording and estimate musical notes, timing, and other performance information, which can then be represented as MIDI events.

Can I convert MP3 to MIDI?

Yes, if your browser can decode the MP3 file. Upload the recording, run the conversion, then download the generated MIDI file.

Can I convert WAV to MIDI?

Yes. WAV is a suitable source format, especially when the recording is clean and contains a clearly audible musical part.

Does MIDI contain the original audio sound?

No. MIDI stores musical event data rather than the original waveform. The sound you hear from a MIDI file depends on the virtual instrument or MIDI sound source used for playback.

Can I convert vocals to MIDI?

Yes. A clear solo vocal melody can be transcribed into MIDI notes. Vibrato, slides, harmony layers, and background instruments may reduce accuracy.

Can guitar be converted to MIDI?

Yes. Single-note riffs and cleaner guitar recordings are usually easier to transcribe. Heavy distortion, chords, bends, and overlapping string resonance can make detection more difficult.

Can piano chords be converted to MIDI?

Polyphonic transcription can detect multiple simultaneous pitches, so piano chords can be converted. Very dense passages or heavy sustain may still require manual corrections.

Can I convert a complete song to MIDI?

You can analyze a full song, but a finished mix is much harder to transcribe accurately than an isolated instrument. For better results, use individual stems or recordings containing one dominant musical part.

Why did the converter detect extra notes?

Extra detections can come from harmonics, reverb, noise, overlapping instruments, vibrato, distortion, or ambiguous note attacks. Adjusting the detection sensitivity and using cleaner source material can help.

What should I do after downloading the MIDI?

Import it into your DAW or MIDI editor, review the notes, correct any transcription errors, and assign the sequence to the instrument you want. If you need to determine the musical key before editing, our guide on how to find the key of a song can help.