Using a [MIXING] Program for Quick Access to Multiple Sounds in a "live" SetupSONG or PATTERN MIXING programs are ideal for assembling multiple sounds that you want to play. Each of the 64 SONG and 64 PATTERN locations can contain a "MIXING" - which is a configuration of all the available PARTS: [F1] PART 1-16. You can easily and seamlessly switch the sound you are playing (without any glitches) by using the TRACK buttons to access the assigned Voice PARTS. You transmit from the XF keyboard on the MIDI channel of the currently selected TRACK. The lighted front panel [TRACK] buttons - will indicate the current transmit status.