> Hi all,
>
> Just wondering if anyone can answer the following question:
>
> Can the A119 be fed with a DC source into its audio input.

No. The A-119 has a AC coupled input. You have to short the capacitors C3
and C4 (the two large 100u types) to process DC signals with the input
amplifier.

> Specifically, I'm wondering if you can feed an envelope signal in and
> then use the built-in comparator to generate a gate delay by
> manipulating the threshold. If so I would like to use it (for example)
> to derive a gate signal half way through an envelope attack stage to
> gate another envelope.

Should be no problem after the C3/C4 mod. But I haven't tried it.

But we have the comparator module A-167 that can do this job without
modification.

Best wishes
Dieter Doepfer