Record a Live Loops performance in GarageBand for iPhone
You can record a Live Loops performance to Tracks view. When you start recording, any cells currently playing are recorded to the corresponding track in Tracks view, from the beginning of the current song section. If you start cells playing while recording, they are recorded from the beat (time position) when they start playing. Any changes you perform to cell settings, such as adjusting the speed, pitch or direction of cells, are also recorded.
Record a performance to Tracks view
Tap the Record button in the control bar.
Start the performance by tapping cells or triggers to start playback. Cell playback is recorded to the track in Tracks view that corresponds to the row of the cell.
To stop recording, tap the Stop button in the control bar.
To view and play your performance, tap the Tracks button in the control bar.