[sdiy] Dual Frequency Shifter update

[JH.]

>> (The whole thing is very unfinished - companders don't work well
>> on fast transients, for instance). You heard the upshift/downshift
>
>That's why I built a log amp - compresses the signal with no delay. Use the
same type log
>amp on the otherside in a feedback path and you get expansion. Together
should be close to
>a compander pair.


A log amp!

That requires a very precisely unity gain in the channel in order not to
cause any
distortion, doesn't it?

Where did you put the encoder? One encoder before the dome filter, or two
encoders at the multiplier inputs?

Tim, I'd love to see this!

JH.