Here is a simplified explanation of the reverb/chorus possibilities from Ben Tubb's famous JV/XP site at
http://www.geocities.com/Nashville/9958/jvxp.html specifically
http://www.geocities.com/Nashville/9958/text/002.txt >>>A Performance Preset contains several level/send values for each patch made from among the following.<<<
>>>1) Patch Tone Reverb and Chorus Send Levels
2) Patch Common Reverb and Chorus Levels
3) Performance Part Reverb and Chorus Send Levels
4) Performance Reverb and Chorus Levels<<<
>>>And the above is independent of CC91 and CC93 controller data being sent to a Part's Assigned MIDI Channel to affect Reverb
and Chorus respectively.<<<
>>>When a Performance Part Output Assign is set to PAT (Patch), stages 1, 2 and 4 apply. When set to MIX, only stages 3-4 apply.<<<
So the simplest method is to set *all* your Part Output Assigns to MIX [Disregard any insert EFX for now] *except* part 10, your Rhythm Kit, because you do* want to be able to have different rhythm kit instruments to have different reverb/chorus settings (just as they are assigned in the rhythm kit already).
>>>When set to EFX, stages 3-4 AND the Performance EFX Reverb and Chorus Send levels REPLACE those of stage 3.<<<
= Don't set *any* part output assign to EFX for now.
>>>Since the synth's MASTER values and output are controlled at stage 4, if they are 0 then the values of the other stages
are irrelevent.<<<
That is, even if the Part levels for chorus and reverb are sky high, setting the global performance reverb/chorus levels to 0 silences all those earlier values.
>>>These MASTER values are normally set to 64 on GS and XG compatibles.<<<
So that's a good place to start. The XP initializes a default value of 127, though.
>>>The other "submix" values then act as proportions among each other.<<<
That is, it's a balancing act between PART reverb and chorus levels and GLOBAL PERFORMANCE reverb and chorus levels.
The easiest way to see what's going on is to spend some time examining and playing with the settings on an initialized default performance.
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(1) Performance mode -> Utility -> 3. Initialize -> Default -> Execute.
(2) Press Effects, then Chorus or Reverb, and look at the level settings. This is stage 4 discussed above. 127 = full tilt.
(3) Press Exit to get back to the main performance screen.
(3) Press Part -> Effects -> Palette
(4) Look at all the reverb levels and chorus levels for parts 1-8 and 9-16; they're all = 0.
(5) Stay in the Palette. Play part one (a *dry* piano part). Now turn the Reverb Send Level up to 127 and play the part.
Whoa. Massively wet reverb. Turn the reverb level down and see what happens to the reverb wash.
Now note that ALL parts except 10 have their output assign set to MIX. The bypass any insert EFX (and their settings) and just respond to what's on the screen there in palette mode.
Part 10 = rhythm output sign = PATCH. That's so the individual rhythm instruments in your kit can be wet or dry.
Remember: You can check the GLOBAL performance reverb/chorus settings by going back to the performance main screen and pressing Effects. If the palette comes up again, press Part and then Effects and you'll go back to the global Performance effects. And again: these GLOBAL settings (especially LEVEL) affect how much or little reverb/chorus you can squeeze out with your PART levels. If the GLOBAL setting is 0, even a PART SEND LEVEL of 127 will yield NO reverb or chorus.
Finally: CC91 and CC93 enable you to change the PART reverb/chorus SEND LEVELs using a controller message. Send a CC91 message of 92 to part 1, and the reverb send level of part 1 changes to 92 (or whatever value you send). That easy.
This is already too long again.
Fool around with the settings in this initialized performance to see what's going on, then compare the settings in your favorite preset performances.
Tracey, does this answer your questions above?
"It seems to me that a performance would be useless if you can't adjust the effects settings for each individual track"
You don't adjust the reverb/chorus levels for each TRACK, but rather for each PART = MIDI channel. You can have all 16 parts (channels) on one track and still adjust the reverb/chorus levels for each part individually.