I recently bought an LK-160 which drops volume on some notes when certain tones are selected. BritePno is the main culprit here, dropping three adjacent notes, A#, B4 and C4. Has anyone else experienced this? Is it a well known undocumented 'feature' of the LK-160 or other LK series keyboards? If it is known, can it be fixed? Regards, MikeK.