Record to multiple audio tracks
You can record to more than one audio track at a time, which allows you to record several instruments at once—placing each instrument on a separate track, for example.
Record to multiple audio tracks simultaneously
Set the instrument or microphone input source for each track you want to record to.
Click the Record Enable button in the track header of each track you want to record to.
Move the playhead to the point in the ruler where you want to start recording.
GarageBand includes a metronome, which plays a steady beat to help you play in time while recording. You can turn this on or off using the Metronome button in the control bar.
Click the Count-in button in the control bar to have the metronome play a one- or two-bar count-in before recording starts.
Note: For the initial setup, choose Record > Count-in, then choose a measure.
Click the Record button in the control bar (or press R) to start recording.
Start singing or playing your instrument.
A new audio region appears on each of the record-enabled tracks.
Click the Stop button in the control bar (or press the Space bar) to stop recording.