Maybe there is. But the point is that you do WANT that the scaling apply to the whole keyboard. In the past, when other keyboards like yamaha and roland could not do that, arabic musicians played only the BASS or WESTERN chords with arabic scales. It really sounded ugly and missing. But unfortunately, many musicians got accustomed to it and continued to use it. Now after GEM does it right, musicians still want to play it the old WRONG way. That is just my opinion.

Scaling info is transmitted on the common channel. So this channel applies to all channels. Maybe under "MIDI", you can find it a way to prevent it to do so.