when I use any control map other than 0 the weird sound problem goes away
That will be because control map 0 is the Sonar map, and it still sends cutoff and resonance data, attack, decay and release values, portomento time changes etc. The BK7 responds to these.
You have probably inadvertanty moved a knob or fader which has caused an issue with the sound. Perhaps set in the control map for your fader controls and knob controls to have a virtual click in the centre. That way it is easy to find the default position again, and get the sound back to normal.
Edited by Sweentech1 (05/06/1105:57 PM)
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Roland G-70, FP-4, BK-7m, SonicCell, KC-350 x 2, DS-5 x 2, A300-Pro, Sonar X1 PE, BR1600CD Yamaha HX-1 System 1, KA-20x2