1. More → Make a Song Like… (or, on an empty Song chart, Make a song like one you love).
  2. Listen With the Microphone and play the song out loud near your device for 20 seconds or more — a verse and a chorus is ideal. Or Choose a Song File… from Files.
  3. Blackcap shows what it heard: the tempo (and whether it swings), the key, the chord loop, and the beat.
  4. Pick which parts to use — Tempo and feel, The beat, The chords, A bass line — and a drum kit.
  5. Build It in This Song (one Undo takes it all back) or Build It as a New Song.