No, Mod Wheel is not a controller memorized by the Scene memory. Modulation Wheel does not have a fixed function. The significance is, until you assign the MW a destination within the Voice, applying it does nothing. All of the functions that are storable to the Scene have a fixed function... Means they always do the one specific thing. Now, not all "fixed function" controllers are memorized in a Scene (Yamaha picked specific ones), but all "cc" (Control Change) numbers that are memorized are fixed function controls... is how it can be stated. (see Extra Credit area below for more info)

"SCENE" parameters memorized per snapshot in the Motif XF are:

• Tempo: The current tempo as shown on the main screen
• Transpose: The Transpose as shown on the main screen – which will transpose all PARTS except those containing a Drum Kit. Drum Kit tracks are not transposed as this would cause drum sounds to be different
• Play Effect: Play FX include quantize, swing quantize, Note Shift, Clock Shift, etc.
• Volume (cc007): Fader settings for all 16 PARTS
• Pan (cc010) :The current pan position is documented for all 16 PARTS
• Reverb Send (cc091): Send amount settings for each of the 16 PARTS
• Chorus Send (cc093):Send amount settings for each of the 16 PARTS
• Filter Cutoff Frequency (cc074): settings for each of the 16 PARTS
• Filter Resonance (cc071) :settings for each of the 16 PARTS
• AEG Attack (cc073): settings for each of the 16 PARTS
• AEG Release (cc072): settings for each of the 16 PARTS

And, of course, 'Track' Mute status.

Extra Credit:
SCENE Memory is borrowed from our digital mixing consoles, where it is a kind of automation that takes current settings and freezes them into a 'snapshot', making them available for instant recall. The XF can store five such 'snapshot' memories to the Sub-Function buttons ([SF1] - [SF5]). These can be used to instantly store/recall settings in 'real time' or the recall can be automated via a special "Scene Memory" Event on the dedicated SONG "Scene Track".

TRACK MUTE status (whether a Track is set to output MIDI data) is also stored to the five Scene Memory snapshot locations, but Yamaha also gave Track Mute its own editable sequencer event - and you can create as many of these as you may require. Track Mutes are not limited in any way to the number of Scene Memory locations. They are documented in the Song mode's dedicated SCENE TRACK.

The parameters that Yamaha selected to be memorized (documented) in the Scene snapshot is based on their potential use to apply "offset" values to the current condition of the mix and/or synth tone engine. The Control Change parameters that are available are the same ones that are available via the KNOB CONTROL Function area - and can be seen as "offsets" to the currently stored condition of the PART. For example, cc074 is Filter Cutoff (and is a standard MIDI control). This is a controller that will apply an offset to the potential 8 Element Filters within the current Voice. It is not a "filter" itself. It sends an offset value, either + (positive) or - (negative), which is applied to the current Cutoff of value of each Elements Filter. If there is no Filter active on any of the Elements, moving cc074 has absolutely no affect - because, it is not a "filter" itself, it sends and applies an OFFSET value to any active filter. This is true for almost any and every MIDI module and synth you encounter. It is a pretty universal Control Change number for Filter Cutoff.

As to the MW which always sends cc001, it has no specific job that it controls in synthesizers. If it controls anything it is assigned and directed to a specific parameter within the Voice's "Control Set". "Control Set" is a [Common Edit] parameter and is where physical controllers (Sources) are assigned to parameter (Destinations). When you assign a controller here, within the Voice, to control Filter Cutoff, you can direct it to a specific Element's own individual/personal Filter, if you wish. MW could also just as easily be assigned to any of 101 different parameter destinations - it does not have a fixed function.

So the point is, cc074 will do Filter Cutoff, always, and it will offset all Elements and their filters, while what cc001 will do is unknown (it is assigned in a Control Set). So you can imagine the functions that were selected for SCENE snapshot memory were those that acted as OFFSETS to current conditions.

One of my "solo instruments" is a vibraphone. What I'm trying to do is have that voice play with the tremolo it has when the Mod Wheel is about halfway up. I want the Mod Wheel all the way down for the other two solo instruments. And I want to switch solo instruments with Scene keys.

From what you told me, it sounds like I could set the vibraphone up the way I want it and then save it as a Mixing Voice. Would that be the best/easiest way to accomplish what I'm trying to do?

From what you told me, it sounds like I could set the vibraphone up the way I want it and then save it as a Mixing Voice. Would that be the best/easiest way to accomplish what I'm trying to do?

Yes, instead of applying the Amplitude Modulation Depth with the Mod Wheel, you could set the AMD within the VOICE so that it is fulltime. You don't tell us anything about the Vibraphone Voice, nor do you tell us what the MW is controlling in the other two solo instruments. But yes, instead of applying the DEPTH with the MW (which will reset to 0 every time it is recalled) set the Voice so that it sounds exactly as you like when you bring it in - or assign it to a controller that can store the exact amount of tremolo you wish to use programmed to it, for example, the AF1 or AF2 switches could be used to apply a set fixed amount of DEPTH for AMD (or whatever it is your other two solo instruments might require). This way when you want the setting you press the button, or you can input an appropriate message to the sequencer data.

If you need help, let us know.