MOTM

Hi list.
just fenish my secound vco and i'm a bit confused about the soft sync.
well when i patch frome one vco sync jack to the other sync jack
and the switches are both on soft i get a strange reaction.
it semes that one vco sound louder then the other while
the one that is louder is in a higher freq then the other,so
when i change the freq the one that is in higher freq is allso
louder,is it ok,and why its hapen ?

i allso did not understand why Paul said that "you would use 99% of
the time hard sync" that cause sidbandes and frome my experince
i use soft sync most of the time as i dont want the hard sync
efect which sounds like vcf Q ?

thanx
Gur Milstein

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!)