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 Forum index » Clavia Nord Modular » Nord Modular G2 Discussion
Building a S/H delayline
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Sander_k



Joined: Jan 28, 2005
Posts: 57
Location: The Netherlands
G2 patch files: 16

PostPosted: Tue Feb 15, 2005 10:02 am    Post subject: Building a S/H delayline Reply with quote  Mark this post and the followings unread

Synth Secrets

Thanks to G2Ian who pointed out to these articles i tried to create a patch with a delay-line of S/H modules. Very interesting stuff..

but it doesn't work very well and i'd like some advise on this one.

I build a patch just as described in the article, but the only thing i hear when i change the clock-rate of the LFO's is an AM-like-effect which seems logical looking at the patch
.
So no spectacular pitch shift or whatever. I wouldn't want to make a leslie simulation with this patch Very Happy
i also seems to make no difference if use 2 or 8 or xxx s/h modules...

what am i doing wrong?

Did somebody tried this with the G2 or NM1 and did it work?


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ian-s



Joined: Apr 01, 2004
Posts: 2666
Location: Auckland, New Zealand
Audio files: 42
G2 patch files: 626

PostPosted: Tue Feb 15, 2005 11:25 am    Post subject: Reply with quote  Mark this post and the followings unread

I think the article was describing how a BBD chip worked but not suggesting that one could be practically made using S+H modules. The real chips used 100’s or 1,000’s in series and were an inexpensive alternative to A2D->Memory->D2A. The end result was unique because each cell was different, resulting in noise. Also the dynamic range was very small requiring companding etc. Also, to get useful delays out of 500 cells, the clock rate was pushed quite low and could sometimes be audible.
Still, if you want to roll your own, I would recommend using two or more DlyClock modules, these offer 1-128 cells connected in series for you. A DlySingleB will do the same thing with much less effort.

Synth Secrets is, on the whole, a great source of ideas and information but it does contain some errors and poorly written sections. It’s like the guy really knows his stuff (and has a sense of humor) but nobody else at SOS knows enough about the topics to effectively edit him.
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Sander_k



Joined: Jan 28, 2005
Posts: 57
Location: The Netherlands
G2 patch files: 16

PostPosted: Tue Feb 15, 2005 12:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

Aha, like that. That's too bad, but still very inspiring articles although some of the articles are little obvious.

I'll try with the delaymodules. ( i believe the G2X came with a factory 'audio in' preset that is called pitch play or something, maybe i can check that one out)
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