Message
Re: CZ1 keyboard issue
2016-07-21 by smw-mail@...
This sounds very much like the what happens by sending bogus parameter data (i.e., outside the range you can enter from the panel).
It might be helpful to try to rule this out (corrupted patch parameter data), by sending sysex patches directly to the sound area instead of one of the memory slots.
Also, in re-reading some of the posts, it is unclear if the "high notes" are legitimate notes within the normal range of the CZ (e.g., not above the highest note possible at the highest octave setting) or if the "high notes" are outside the normal CZ range.
Hope this helps get to the issue.
Steve