You find my comments written inline

Best wishes
Dieter Doepfer

> these are the uses of a cv offset that immediately spring to
> mind. please correct me if they
> can be achieved by other means:
>
> 1. a vc offset is also a dc offset. so that any audio signal that
> distorts will distort assymetrically.

Only if the signal processing is DC coupled, otherwise the offset is removed
again. Unfortunatlely most audio processing modules (e.g. filters and some
VCAs) are AC coupled and the assymmetrical distortion has to be a feature of
the module (as e.g. for the extreme filter A-106-1 or the distortion module
A-136).

> 2. envelopes and lfo's can be swept into and out of negative voltages - so

i don't need to

> pull out a lead and plug it into a voltage inverter while i'm playing.

That's not the offset function but a polarizer ! You probably mix up
positive/negative offset and positive/negative amplification. Both is
possible e.g. with the A-138c. So you probably ask for something like the
two upper sections of the A-138c as a single module.

> now i've got my pitch envelope gliding into the played pitch, instead of

the other way

> around. or having the played pich at the sustain level, with a too low/too

high it at

> the start of a note.

> 3. already mentioned: i'd like to have vco's play in thirds. a 138 would

do it, but it's

> slightly overkill, oder (dieter, is there a hack to increase
> the range of the tune knob on the standard vco )

This has been discussed and answered several times:

www.doepfer.com > PRODUCTS > A-100 Modules Overview > A-110 > Service Manual

> R5 (internal remarks, only in German available, Anpassung R5). Decreasing

R5 (now 1M increases the tune range)

Please look also at the A-100 DIY page:

4. Module modifications
4.1. General modifications (not for one module only)
4.1.1. Changing the sensitivity of manual controls, control voltage inputs
and audio inputs