[sdiy] beginner(2)

[harry]

Hi Jimmy:

I think the reason you are not getting a direct answer is because its a
really
complex issue. I'll try in few words...

Analog synthesis modules come in three varieties...

Sources : Make sound
VCO
Noise Source
(VCF if it is oscillating...)
(LFO turned up to the Audio Range)

Modifiers: Change sound
VCF
VCA
Ring Modulator
Lag Processor (might be for control or source modification...)
Phase Flange Echo Reverb etc...

Controllers: Program the operation of Sources and Modifiers
Keyboard
Sequencer
Evnelope Generator
LFO
(A VCO that is sub-audio range)

The idea of voltage control is that many parameters can be "patched" to
allow
automatic or semi-automatic (triggered by the keyboard perhaps?)
changes.

Now all the boundaries of these functions are fuzzy. With the standards
of voltage
control, almost any output may be routed to any input. You are limited
by your
imagination, your aesthetic sense, and the number of patchcords or
modules you
possess (hence the DIY arms race....)

I hope this helps a little bit. The sources that others suggested are
very good. I started with the PAiA 2720 synth myself... and still use
the VCA's to this day.

I taught myself analog synth operation from the ARP Odyssey user
manual... by
atudying the patches. Study of the ARP 2500 advertising poster made me
proficient
enough to play the instrument at first meeting (as an uninvited guest of
the Berklee
School of Music). Since I obviously knew what was what... no one noticed
that I
was not a student for several hours !   ;^P

Feel free to ask whatever questions you like. This info is  the basics
of what you need
to know. All other list members will now contribute / flame me for my
dissertation.

H^) harry

Jimmy Gogas wrote:

> Thank you guys for all the feedback. I might have forgotten to tell
> you that I actually know how to use a soldering iron. So actually
> implementing the circuit is not really a problem (even though I am
> almost certain that problems WILL arise). What I really need to figure
> out is the theory. I have many questions (most of them pretty "stupid"
> to your eyes) that deal with the calculations and theory. So what I
> was wondering is if someone can send me some info on the actual theory
> part. Theory for instance about what the CV and FM inputs actually do;
> the various stages of a VCO; how the ADSR actually control the VCA and
> VCF... What I'm trying to say is that I know what each module does
> (I've read all the sites many times), I just don't know the nitty
> gritty about how they go about doing it. As I said in the previous
> email, I'm currently in university, so don't be too shy about
> terminology. I've taken some basic circuit, electronics, filter, DSP,
> etc. courses, so I'm aware of most principles. I also wanted to note
> that I'm not really interested in buying a kit. I'm more interested in
> taking a certain schematic, putting it on a board, testing it, looking
> at the results and learning as I go. Thank you all in advance.
>
>
> -----------------------------------------------------------------------
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