Sing Lupa is for sketching musical ideas by singing. Pick a vibe and a beat, sing a loop over it, and choose the instrument you want to hear it played on. Add up to four tracks, say a bassline or a harmony, and drag any notes it heard wrong.

Then press Sing Lupa! and the loop grows into a whole song, with Lupa the wolf howling on the hill. You can send the song to someone as a link or take it into other music software as MIDI.

It runs in the browser and works offline. There's no account and nothing is uploaded.