[sdiy] Companders

[Scott Stites]

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....