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<DIV><FONT color=#000000><FONT size=4><FONT size=3>I was really surprised at the
interest and feedback I got regarding my ailing Cheetah master controller.
Paul Schreiber has kindly agreed to take a look at it, I'm in Houston and he's
in Fort Worth so it works out great. However, since several list members
asked for details, I'll cut and paste from my letter to Paul describing the very
odd symptoms.</FONT></FONT></FONT><FONT size=4></FONT> </DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV>The problem with the unit is extremely strange. When I play certain
notes,<BR>ONLY in combination with certain other notes, they begin to
trigger,<BR>rapid-fire. It almost sounds as though an arpeggiator is
running, but only<BR>on those notes. In all of the examples below, I'm
talking about playing a<BR>major chord, with both hands, beginning on the root,
and covering two<BR>octaves, with all elements of the chord present. For
instance, the first<BR>chord would be the third B below Middle C, then the d#
immediately above<BR>that, then the F#, B, D#, F#, and on top, the B directly
below Middle C.<BR>This is just by way of example, there are other combinations
that cause the<BR>problem, and I'm sure I haven't exhausted the possibilities of
combinations<BR>that MAY cause it.<BR><BR>But for the purposes of explaining the
problem when I play the two fisted<BR>triad described above beginning
on<BR><BR>3rd B below middle C - most of the notes multiple trigger<BR>2nd Ab
below m C - Eb below m C mult trigs<BR>Eb below m C - G above mC mult trigs, top
Eb does too, but at slower rate<BR>B below mC - the highest D# mult trigs,
highest B does too, but at a slower<BR>rate<BR><BR>the lowest Eb on the keyboard
- almost all notes retrigger<BR><BR>Note that there is always a D# or Eb
involved. If I understand the little<BR>bit that I know about keyboard
design properly, if octave division is<BR>involved, shouldn't this be a
clue? It seems and awfully strange<BR>coincidence, otherwise.<BR><BR>You
should also know that when I spread out a chord for a more open voicing,<BR>I
still have the problem, but again, only in chords where an Eb (D#)
is<BR>involved..........<BR><BR>Another part of the whole weird mess, and this
only one example: If I play<BR>a B major triad below mid C, and the notes
are retriggering themselves, and<BR>I hold that chord down with my left hand,
then play the same chord a couple<BR>of octaves up with my right, the problem
will stop, UNTIL I LIFT UP MY RIGHT<BR>HAND, when it begins
again.<BR><BR>Needless to say, it renders the keyboard worthless.<BR><BR>What
I've already done:<BR><BR>Completely isolated the Cheetah from the rest of my
rig<BR>(midi patchbays, multiple modules, even used a different AC outlet
and<BR>physical location)<BR>Used different modules for testing<BR>Used only the
MIDI out port #1<BR>Used different MIDI cables<BR>Verified with a sequencer that
the keyboard is, indeed, sending multiple<BR>notes on<BR>Cold booted<BR><BR>So I
think the above notes are well researched; I don't think I can blame<BR>the
problem on anything but the Cheetah itself. </DIV></BODY></HTML>