Suno to MIDI Converter

Step by step: a Suno song to MIDI

1. Get the part on its own. Download stems from Suno if your plan has them, or run the song through the stem separator and keep the vocal or bass stem.
2. Drop the stem (or the full song) into the converter above.
3. Set Pitch range to Melody for a vocal or lead synth, or Bass for a bass line.
4. Pick the grid. 1/16 keeps fast vocal runs; 1/8 is cleaner for most melodies and bass lines; 1/4 for slow, held notes.
5. Convert, then check the piano roll, the BPM and the key before you download.
6. Drag the .mid file onto an instrument track in your DAW and fix any wrong notes by hand.

Settings for each part

• Sung melody: Melody range, 1/16 grid, Humanize 25%. Vocals slide between notes, so expect some short extra notes to delete.
• Bass line: Bass range, 1/8 grid, Humanize off. Bass notes are long and on the beat, so a coarser grid gives a cleaner file.
• Lead synth or piano melody: Melody range, 1/16 grid. A single-note lead converts best of all.
• Full mix: Melody range, 1/8 grid. Treat the result as a sketch of the main hook, not a transcription.

Fixing the MIDI in your DAW

• Song plays at double or half speed: the tempo was read as half or double. Set the project to the real BPM (for example 160 instead of 80) before you import.
• Some notes are an octave off: a strong overtone was picked instead of the note. Select those notes and move them by 12 semitones.
• Lots of tiny notes: delete everything shorter than a 1/16 note, or convert again with a 1/8 grid.
• Wrong key shown: the key is a guess from the notes found. Check it against the Key & BPM finder on the original song.

How it works

Your file is decoded and mixed to mono in your browser. The tool then reads the audio in short frames and finds the strongest pitch in each one with an FFT and a harmonic product spectrum. Short gaps are filled, notes shorter than half a grid step are dropped, and the result is snapped to the grid you choose. Only one note plays at a time.

Tempo is estimated from the energy pattern of the first 30 seconds and kept between 70 and 140 BPM. The key is guessed from the notes it found, using standard major and minor key profiles.

Settings

• Pitch range: Melody (about 150 to 1100 Hz), Bass (about 50 to 350 Hz) or Full (about 50 to 2500 Hz). Pick the range of the part you want, so other parts are ignored.
• Quantize grid: 1/16, 1/8 or 1/4 notes.
• Humanize: moves note timing and velocity slightly off the grid at 25, 50 or 75 percent, so playback sounds less rigid.

What you get

A standard .mid file with one track, the estimated tempo written in, and all notes at the same base velocity before humanizing. You also see the estimated BPM, key and note count. Open the file in any DAW, assign an instrument, and fix the notes by hand. Downloading the MIDI file needs a membership.

Good to know

• It writes one note at a time. Chords, pads and stacked harmonies come out as a single line or as wrong notes.
• Drums and percussion are not converted.
• A full Suno mix gives a rough sketch at best. For cleaner results, split the song first and convert the vocal or bass stem.
• Files up to 100 MB and 15 minutes. BPM and key are estimates, so check them before you build on the MIDI.