Perhaps "separate" was a poor choice of a word, as how "separate" the 16-Part multi-timbral sound source is depends on how you have the keyboard set up, but I chose that word at the time in order to counter criticisms on this and other forums that the Juno-Gi (A)-Lacked a sequencer (True) and (B)-Was not 16 part multi-timbral (False). Browsing the first few pages of the manual, which describe the Juno-Gi's 4-Tone LiveSet architecture would certainly give one the impression that the Gi was only 4-Part multi-timbral. Actually, in that respect, it is really only 2-Part multi-timbral, as the two upper LiveSet tones are paired together onto the MIDI MAIN-Channel and the two Lower LiveSet tones are paired together onto the MIDI SUB-Channel. That is the default sound source architecture of the Gi - 4 LiveSet tones (2 Upper and 2 Lower) to be played from the keyboard. True - You can not concoct a massive 16 tone layered "Performance" stack as with the older units, but that was not the Gi's intended forte. However, when the Gi is placed in MIDI Controller Mode by pressing the MIDI Ctrl button or by sending it a GM/GS reset from an external DAW/sequencer, local keyboard control of the LIveSets is switched off, and you now have a 16-Part multi-timbral sound source with a default GM voice bank to be played from an external source. So, when viewed from the stand point of switching between the two, the word "separate" would seem to fit, but it is possible to do both at the same time, and in that case, "separate" no longer applies. With the external DAW/sequencer still connected, it is possible to take the Gi out of MIDI Controller Mode and play the selected LiveSet along with the incoming MIDI data. In that case, whatever channels are assigned to the LiveSet MAIN and SUB Channels must be reserved for keyboard play leaving only 14 channels to play data from the external DAW/sequencer. By default, these are Channels 1 and 2 respectively. In this case we have a "COMMON" 16-Part multi-timbral sound source, 2 for local LiveSet play and 14 for external sequencer play. This is really no different from reserving one or two (split) channels (parts) of a straight forward 16-Part unit for local play while the rest are set up for sequencer play. I guess, in a way, we are really looking at a standard 16-Part sound source, it's just that two of the parts CAN be LiveSet parts. By the way, they can also be played by the external sequencer instead of by the keyboard.
Hope this helps. Sorry for the confusion.
Regards,
Ted