[sdiy] CV inputs with bipolar "amount" knobs

[Tom Wiltshire]

Hi All,

I know various people have built various devices with CV inputs that have bipolar "amount" knobs so that you can easily invert a CV input - particularly useful for envelopes and such like.

How many different ways of doing this are there? Can anyone provide a reference to a schematic online?

I just had a big hunt around thinking I'd find loads, but mostly they must be parts of other circuits 'cos I couldn't find any.

Any pointers appreciated.

Thanks,
Tom