Doepfer

The information about the A-129-3 on our website says "Module A-129/3 is
suitable only for the processing of control voltage signals. It cannot be
used to process audio signals". The reason is the internal structure of the
module: voltage controlled switches and capacitors built kind of a low pass.
The control signal for the switches (slew control input) has to be a
rectangle with about 100Hz and about -5V/+5V level (formerly generated by
the obsolete A-129-4). The pulse width of the signal defines the slew (0% =
freeze, 1...99% = slew, 100% = follow). E.g. a VCO or LFO with a
zero-symmetrical rectangle and adjustable pulse width can be used to control
the A-129-3.

Best wishes
Dieter Doepfer


> Hi,
>
>
> I just bought a-129-3 for using it as an attenuator/offset generator.
>
>
> There seems to be slight (and very short) lag time when
> processing external cv most noticable if you feed the output of
> a-129-3 to pitch input of an oscillator. This is probably because
> it works only with cv and not audio signals, right?
> Also it is not very useful for attenuating very fast envelopes
> which is expected. Does a-183-2 behaves differently with fast cv signals?
> I don't have the a-129-4 so the slew input on a-129-3 is
> completely useless? I tried to feed it with some cv signal but
> couldn't establish what exactly is happening.
>
>
> Thank you for the answers!