I recently bought the Yamaha-P90 for use as a MIDI controller. As most of the keyboards in this price range, it comes with a brightness (mellow<->bright) slider. Does anybody know if it's somehow possible to use it as a MIDI-Controller (e.g. as replacement for the missing modwheel in Gigastudio) or isn't it even transfered as MIDI signal? (Means that I gotta buy a BCR2000 or so..)

Thanks in advance,