Make music from an idea
Describe what you hear in your head. Musical writes it as parts you can play with.
Describe it
A genre, a tempo, a key, the instruments and a feel are enough to start.
A lo-fi beat at 85 BPM with dusty drums and Rhodes chords
A slow piano piece in D minor that opens up halfway through
Everything stays editable
Musical writes each part as notes on an instrument. Double-click a clip to see and change its notes, choose another instrument in the inspector, or ask for a variation.

Build the song
Ask for an intro, a hook, a break or a last chorus. The song's sections are named across the top of the tracks, so you can ask about one by name.
Add yourself
Press R to sing or play into your microphone from the play position, after a bar of count-in, onto a new track.