I think what Michael's is asking here is whether it's possible (yet) on any Yamaha arranger kb to select a different auto accompaniment style via a midi foot pedal controller (like the Yamaha MFC10) which is programable to send midi SysEX messages. The answer is: NO.
If Yamaha ever decides to add SysEx support (assigning a unique 'system exclusive' message) to each one of its internal styles, it would then be possible to select/change styles via a programable multi foot pedal midi controller like the MFC10.
One thing I'd like to see on a future Yamaha arranger keyboard is adding 'SysEX support' (assigning a SyEX message) to each of the 4 multipads which would then allow you to trigger any one of them from the MFC10.
Because Yamaha arrangers only include 2 (PSR2100) or 3 (Tyros) dedicated (non midi type) single foot switches, it's not possible to assign/trigger all 4 multipads from footswitchs. If SysEX support is added to each of the 4 multipads, then you could program/trigger them from any 4 assigned pedals on the MFC10. The ability to spontaneously trigger the multipads (4) from remote footpedals would further add to the realism of arranger keyboard performance. Steve Deming: I hope you'll consider passing this request on to Yamaha Japan's R&D dept. Thanks, - Scott
PS: The list of all SysEX supported features on Yamaha arrangers can be found in the associated 'Data List' manual which comes with your Yamaha arranger KB. This begins on page 56 for the Tyros in its 'Data List' manual.