Some time ago I made some experiments using the sliders. I came to the following result:
The sliders DO send midi signals when used as drawbar sliders. However, they send a complex midi sysex command containing the values of all sliders in one message. I could read the values using a programmable midi app on the iPad. But for controlling external devices or programs, this is not suited.
So, we cannot assign arbitrary midi CC commands to the sliders. However, many of the assignable functions DO send midi CC commands. There are two possible settings:
Use the setting where the sliders change the volume if the song parts. So they send CC#7 on different midi channels. This is the easiest way, because this setting exists. Of course it is not so easy to receive midi messages on all channels for one devices.
The second way would be to select those parameters that do send midi CC messages, all on the same midi channel. I think about the standard parameters like modulation (1), volume (7), expression (11), reverb (91), chorus (92) and so on. If the target device is configurable or has Midi-Lern you could use these messages to control what you need.
Of course the the midi configuration of the Genos must bet set according to the needs. Perhaps use the commands on the part right 3 and set local off for this part, or something like this. But I think, it should be possible. Experts like Joe, PJD or Bachus will find a solution.
Uli
P.S: I cannot try this on my Genos in this moment. I will report a practical example later.