Quite simple : plug a midi cable between Out and In.
Default audio tracks channels are 1-8.
Set your midi tracks correspondingly.
You can also set all audio tracks on the same channel, and control all them with one midi track channel. That way you can control all tracks filter with one knob, for ex. So you can also use the 8 midi tracks on the same channel and use the 24 lfos for all audio tracks, and TRC of course.