ringmodulator

[Harry Bissell]

Hi Corneel...

When there is no input to a 4 quadrant (ring) modulator... it should be
SILENT.  In the
imperfect world, there are things like  INPUT OFFSETS that allow carrier
bleedthrough.
I haven't seen the PAIA schematic (send me a copy if you like) and I'd be
happy to
offer specific advice... In general you need at least two trims (x and y
offset) and sometimes 4 trims (x and y gain) and some circuits have even more
to reduce the bleedthrough to a minimum.

PAiA makes a very cost conscious product... sometimes they will elimiate of
combine trims that do not (ITHO) contribute to the sound and much as they
detract from a reasonable price.  This is an engineering tradeoff (no thats
not an oxymoron its a way of life !!!)... a "perfect" ring modulator might
cost more than all the synth gear you currently own...

Or you might have a problem...? Maybe your unit does not work as designed.

One other trick... if you run your signal input to an envelope follower, and
gate a VCA AFTER the ring, that would reduce feedthrough also....

H^) harry

Kyn Si wrote:

> Hi,
>
> I've have built the paia 4710 ringmodulator. It works fine, but I have one
> question.
> When using a sine-wave as modulator and an 808 as carrier, I keep hearing
> the original sin-wave between the 808-sounds. I think this is normal, as
> there is at that moment only one input (the sine, the 808 is silent for
> small periods between beats). But is there a way to solve this, in such a
> way that if there isn't a carrier signal, you won't hear the modulator
> signal?
>
> Thanks,
>
> Corneel.
>
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> "the modern day composer refuses to die" - E. Varese
>
>             "real music never will" - K.S.
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