Focusrite ComPounder......schematic?

[HiString]

I'm looking for a schematic for the Focusrite ComPounder.............if anyone can help it would be greatly appreciated.

 

[Twin-x]

Looking for that one as well.
So erm anyone

 

[Rogy]

Hi guys,

Go to http://users.pandora.be/Rogy and download the folder Compounder.zip.



Greetz,


Rogy

 

[HiString]

Rogy,

Many thanks.

:sam: :thumb:

 

[owel]

What is a compounder anyway? Is it like a compressor?

 

[HiString]

Yeppers. A dual comp/limiter and gate/expender.

I don't own the one I need the schem for so I don't know how they sound, just that this one appears to have cooked the pwr trannie.

 

[owel]

I see... thanks. I've heard of "companders" (compressor, expander) but not "compounders".

 

[SonsOfThunder]

[quote author="owel"]I see... thanks. I've heard of "companders" (compressor, expander) but not "compounders".[/quote]That was just FR's model name for this.

 

[sismofyt]

Thank you for the schematic!

Hmm, that's a lot of components :shock: Opto gate, discrete VCA comp & opto limiter (is that possible?) What is an 'NSL32-023'? Is it really fast enough for a limiter? That Fat/Huge switch or whatever it is called, works like a charm, maybe that inductor trick could be used in the SSL clones? :wink:

 

[Guest]

NSL032 - optocoupler?
http://www.silonex.com/audiohm/application.html
http://www.silonex.com/audiohm/compressor.pdf

 

[sismofyt]

Yes, that's the one :thumb: I can't find the NSL032-023 though. The others seem to have an on time from 1mS to 6mS.

 

[Guest]

there's a mention of it on page 3 of the sonifex compressor pdf..

 

[sismofyt]

Yes, but I still can't find a datasheet for that graded 023. The other 032s have a on/risetime of 3,5mS. That's not quite fast enough for a limiter, ime. I did try out the compressor section once and that was nice :grin:

 

[StephenGiles]

Now look here old chap - let's be British about this, Focusrite would not have marketed the beast if the NSL32-023 was not up to it, and may have resorted to the old tried and tested combo of 2252/2180 or 2181 - and on top of that it's an excellently produced set of circuits, just right for veroboard!
Stephen

 

[sismofyt]

Are you kidding, ol' chap? Let's be danish about this; So Focusrite is the pinnacle of engineering, huh? British or not, it's well done average stuff. Also, I don't think it's a good candidate for a veroboard project. Quite a lot of components..

I do remember the comp action to be nice, but I didn't try the limiter or gate. But generally I'd say optos aren't the best for use in a limiter. you and Focusrite may disagree. YMMV and all that jazz..

 

[StephenGiles]

Danish eh! Well I suppose we all have a fragment of Danish in our blood over here after the boys with cow horns on their heads invaded 1200 years ago. My point is that I always build on veroboard unless I have a pcb available. I just don't make them, like I don't do diy or mend my car. I suppose the biggest project I ever did on veroboard was the Electroharmonix guitar synth back in 1980. I think quite a few folks use it over here because Maplin always has it in stock!!!!!

 

[StephenGiles]

Rogy - aside from all the off subject banter, the Focusrite circuits are very interesting - thanks very much. Is there a circuits section on their site do you know?
Stephen

 

[Guest]

Regarding the Optocoupler..

Reply from Silonex
See - you can get maunfactures to talk - just have to ask them in the right way!!

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Hi Simon and thanks for the reply,
Yes I can see it on the PDF, but it is a part that is not standard and
that was specially selected for a customer so I apologise for that. We will
update the PDF. May I suggest that your customer tries the NSL 32 SR3 as a
replacement.

Best regards,

Euan.

-----Original Message-----
From: xxxxxxxxxxxx
Sent: Monday, July 26, 2004 9:48 AM
To: Euan Davidson
Subject: RE: Optocoupler NSL032-023


Euan
I have seen it mentioned in a few schematics and pormised to try and get
some info for some developers of mine.
The only mention on the Silonex website is a passing reference in a
compressor pdf
But you don;t seem to stock it - I am just wondering what is so special
about this one?

Kind Regards
Simon

 

[henk]

Could somebody dend me that nice schemo aswell.
If possible at : htgerbenzon(at)hotmail(dot)com

 

[gyraf]

the link is still alright..!