SV: [sdiy] Matrix 6R filter problem

[karl dalen]

If the filter cuts in 24 db but are only upp a bit in freq check the
filter capps (4 of them)and  check the DAC CV at VCF CV pin input.
If these are OK then something are wrong with the IC!

130 are great price!

REG
KD
 
--- rkmoore at memphis.edu skrev:

> Hi everyone,
> 
> Today I got my hands on a Matrix 6R (for $130!) that seems to be in good
> order, except one voice has a problem.  The filter sounds like it has a
> higher cutoff and resonance setting than the other voices on most
> patches.  I have briefly combed the internet and learned that this synth
> uses the CEM3396 osc/filter IC (any left Paul?).  The voice DOES play,
> and the oscillator sounds fine, but the filter sounds wider open than
> the others.  I tried the 'calibrate' command, but didn't notice a
> difference afterwards.  Has anyone dealt with an M6R in similar shape? 
> Also, is it possible to simply de-assign the bad voice and use the other
> 5?  I haven't had the machine open yet, so I haven't tried moving IC's
> around to see if the problem moves (hope they're socketed!).  Any
> responses will be appreciated.  I've got a 48 hour return period from
> the store.
> 
> Thanks,
> 
> Richard Moore
> 
>