[sdiy] Companders

[harrybissell]

Hmmm....

for a flanger it should be OK to tie the compressor and expander together...
as the delay is 'really' not the feature.. the resulting comb filter is.  I'd
even
say you could use the original input signal to noise gate the delay line
output...
since you will sum the two anyway...

say... this ain't for a BBD flanger is it ???    ;^P

H^) harry

Scott Stites wrote:

> Jhaible wrote:
>
> > That compressor is linked to the expander. Because the frequency shifter
> > doesn't produce delays (only some phase delay from the dome filter) this
> is
> > no problem. Infact it is a good thing to do. But I don't think this scheme
> > can be applied to a delayline, unless one would delay the steering voltage
> > as well.
> >
> > You are right. I didn't get that it was for a delay line.
> >
>
> I don't think I mentioned the application in the original question (it is a
> delay - a flanger more specifically).  I should have considered the fact
> that the application would determine how the compander should be
> implemented, and mentioned the app when I posted the original question.
> But, this exchange has at least taught me one more thing about companders.
> Thanks Rene and Juergen.
>
> And:
>
> Edu Silva wrote:
>
> >Hey, there's more!!
>
> >AN174:   Applications for compandors SA570/571
> http://www-us.semiconductors.philips.com/acrobat/applicationnotes/AN174.pdf
>
> >AN176:   Compandor cookbook
> http://www-us.semiconductors.philips.com/acrobat/applicationnotes/AN176.pdf
>
> Looks like another great set of links to bone up on these things so I can
> start asking the really hard questions :).
>
> Thanks all,
>
> Scott
> Who feels much, much better now that the list is back online....