Crumar Musical Instruments User Group.

PS and I should have said to trouble shoot you can use a headphone amp
(nice because small and a volume control you can thumb operate as you
are probing around often.  I built a custom one for this purpose)  and
just hook a probe to a jack that goes into it.  THen you can ground
clip onto the ground of what you are working on and put the probe on
various pins of the TOS for instance and you can hear all the
frequencies there.  If one is missing or distorted it should be
obvious that you then have a bad TOS. -Bob