[sdiy] companders

Ullrich Peter Peter.Ullrich at kapsch.net
Thu Oct 7 16:27:59 CEST 2010

Another solution would be the use of HighCom Chips or Modules from Telefunken.
But this option would only be interesting for Prototypes and not for series production 
as these chips are now obsolete.

But if you can find chips or modules they do a nice job.

Eumig and Telefunken TapeDecks used these modules and worked fine.


Von: synth-diy-bounces at dropmix.xs4all.nl [synth-diy-bounces at dropmix.xs4all.nl] im Auftrag von tu at alphalink.com.au [tu at alphalink.com.au]
Gesendet: Donnerstag, 07. Oktober 2010 10:43
An: mark verbos
Cc: Synth DIY
Betreff: Re: [sdiy] companders

I don't think the 571 style compandor works very well as a noise reduction system. The Roland SBF flanger uses this method and is still rather noisy.

Eventide used DBX type II noise reduction on their H910 and H949 harmonizers and the H910 delay sounds superb for a 10 bit system. Why not pick
up a cheap DBX encoder/decoder and try running the signal through that pre/post your delay?


On Thu, Oct 7th, 2010 at 7:00 AM, mark verbos <mverbos at earthlink.net> wrote:

> I have a noisey as hell delay circuit that I'm trying to rethink. How much
> noise reduction can one expect to get from a classic 571 compander?
> Mark
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> Synth-diy at dropmix.xs4all.nl
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