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- From: cgra@btma74.nohost.nodomain (Chris Gray)
- Newsgroups: comp.dsp
- Subject: Emulating Analogue Synthesis on a 56001
- Message-ID: <1454@se.alcbel.be>
- Date: 27 Jan 93 15:48:23 GMT
- References: <gate.g2BVXB1w165w@sytex.com> <1993Jan25.051525.11208@convex.com>
- Sender: guest@se.alcbel.be
- Reply-To: cgra@se.alcbel.be
- Lines: 30
- Nntp-Posting-Host: btmw53
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-
- Hello everybody,
-
- I am interested in using the 56001 in my (not-yet-quite-bought) Atari
- Falcon to emulate the sort of things that analogue synths do - you know,
- VCAs, VCOs, ADSRs, ring modulators, all that kind of stuff. Most of this
- amounts to table lookups and a couple of add-and-multiplies, but I would
- appreciate a push in the right direction for the (sinusoidal) oscillator/
- filter stuff. I particularly like the kind of circuit which can be a filter
- _or_ an oscillator, with a *most* interesting region in between.
-
- DSP books I have seen so far seem to concentrate on doing things that
- analogue filter's can't. Cheesy litle filters a` la VCS3 should be dead
- easy, but my own attempt at defining one using difference equations seems
- to oscillate a bit too well - like explosively :-[
-
- To do what I'd like to do I only have a few tens of instructions to spare
- per sample, so going into the FFT domain is not on.
-
- If DSPs are obselete, should I be buying a machine with 80% of its power
- in the DSP? Dunno. Falcon flames to U:\dev\null please.
-
- __________________________________________________________________________
- Chris Gray | Any views expressed are those of the author and not of
- cgra@se.alcbel.be | Alcatel Bell, Technology Project Services, the British
- Compu$erve: | Computer Society, Whale and Dolphin Conservation Soc.,
- 100065.2102 | Scottish Youth Hostels Association, etc. etc. etc.
- __________________________________________________________________________
- A concept that cannot be expressed tersely is a badly understood concept.
- - Chuck Moore
-