Archive of the former Yahoo!Groups mailing list: MOTM

Here is the status of Soft Sync.

This was copied exacly from the EMu 1201 VCO circuit. It worked on
the breadboard, it worked on the 1st prototype.

However, it seems the circuit is "right on the edge" of working ∗like∗ the
EMu one did.

What is supposed to happen is that the synch pulses are "Wire-ORd" together,
and
each VCO resets only if it's cap was close to ground anyway.

What it looks like is that instead of "soft" you can get "medium" (what Gur
sees). The 2 VCOs
react by the fastest VCO "overrides" the slower one.

Hopefully this can be fixed by adjusting the R/C network that copules sync
back into the
comparator input [R21 & C2] .

Please be patient and forgiving: I am up to my eye-balls in TI DSP work AND
I'm still
trying to finalize the MS-20 filter (except you have to promise me NOT to
complain that it
doesn't sound like YOUR MS-20. )


Paul S.
(and I have a very nasty head cold!)