Vintage Simmons Drums (UK) Users Group

Sim-On's, as in "simulation on" ;)

electronically yours, jesper
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www.electronic-obsession.se


----- Original Message ----- 
From: "dalenkarl" <dalenkarl@...>
To: <Simmons_Drums@yahoogroups.com>
Sent: Thursday, August 18, 2005 11:23 PM
Subject: Re: [Simmons Drums] Remake of famus simmons!


--- In Simmons_Drums@yahoogroups.com, "Paul Maddox (Mail LIsts)"
<Paul.Maddox.Mail-list@S...> wrote:
> K,
>
> > Well, there is no copyright issue "exept" "perhaps"
> > for the name simmons, we could name it Limmons for instance! :-)
>
> Hehe.

Limmons and Dimmons! :-)

>
> > Well, i just had a look at it, base the VCA and VCO VCF on 13700
> > and we are dirt cheap, one side does VCO the other does VCA
> > "including" sine shaper and 2 quadrant modulator FM as default
> > in VCO, drums dont need tempcos so we save an awful lot of money
> > there. Nor do we need perfect tracking so standard components
> > will do for every thing.
>
> :-)
> To get that 'simmons' SDS-V sound, you need a 4 pole filter,
preferably a
> moog ladder (SSM2044)

I dont know the internals of the V, but if VCO produces
triangle as in those Simmons units based on CEM3394,
then perhaps (for filtering it down to sine) but if
the VCO allready does sine no filter at all are needed.

Besides resonance are not used in most Simmons drums so
character of filter type are most invisible unless heavyli
saturated inputs. But of that im not shure since it was
long time i heard a SDS.

> > Sequencer brain including user interface (pot scan),
> > demux for drum voice controll can stay at 8 bit all
> > done with one of your favourites, AT MEGA16 for instance.
>
> Pretty cheap, yes..
> Then theres the PCB, Power supply, Case and assembly costs.

Powersupply are standard wallwart 9V AC filtered into +/-6 to 8V
and a +5V dirt cheap.

PCB, well there are cheapo places to deal with.

Case, a problem tought, shoe box perhaps?

Assembly, well DIY!
>
> > I dont consider the hardware the biggest cost, a quick look
> > says 8 voice module including evrything, brain etc could be
> > done well under 250euro! Thats the "raw" cost, no profit,
> > no taxes, etc.
>
> Go for it, But I think you'll be in for a surprise when you goto
manufacture
> it..

Well, i was more into the DIY side of it! Make a PCB and
programmed MCU in a kit, builder gets rest. Lets say 150euro
for that (ex shipping).

> I recently tried to build a polysynth, to make an 8voice
digital/analogue

Yes i know! :-)

> poly was going to cost around \ufffd2500 to make, which meant I'd have
had to
> sell it for over \ufffd3000, and not many people will pay tthat for an 8
note
> polysynth these days :-(

Saad truth yes i feel the pain!

But also, it depends on how you build it, do it the moog voyager way
and you "must" ask 3000usd for it (what a over done synth that is)
Or be clever and minimize to a absolute minimum to achive desired
function, yes i know its a "really" hard task to achieve.

I was very supriced when i saw the inner electronics of the Voyager!!

Reg
KD







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