SergeModular

--- In SergeModular@y..., John Papiewski <johnp@w...> wrote:

> Does anybody besides me have the following trouble with their VCO or

VCM

> ---
>
> The sine wave output of all 3 of the VCO's (NTO & PCOx2) on my blue
> voice panel have slight 'flyback' buzziness, audible especially at

lower

> frequencies. As if waveshaping is a little off. You'd expect that

on

> one but not all 3. I've checked out other people's Serge vco's,

their

> sinewaves are very good in this regard, don't know what it could be.
>
> My VCM #2 (the middle one) is somewhat noisy, as in unwanted added

white

> noise.
>
> Thanks
>
> John P.

Ditto for my sine outputs (2xNTO, 2xPCO). Since they sound exactly
the same, I'd chalk it up to the nature of the design rather than
a manufacturing flaw. The buzziness sounds like it contains both
odd and even harmonics so it's not the case of the "sine" being
constructed by integrating a triangle wave. I've never been
annoyed by this because I use the sine outputs for modulation
or to add bass response. Also the pulse/square output from the NTO is
slightly duller than what I get by using a comparator.

If you've heard "clean" VCO's, do you have an idea
what year they were made?

I have no problems with the wave multiplier though. The sound is
exceptionally clean even at low input volumes.

Cheers,
--Harvey