Re: [AH] analog modular w/ d-g-t-l CV's

From Andrew Scheidler
Sent Sun, Jul 27th 2008, 17:35

Because there are people who paid for their PSIM years ago and still
don't have it.  IMO, the builder over-estimated his ability to produce
the modules in quanity.

Any audio coming through the PSIM will sound *nasty*.  I have a sound
sample of the "4-bit" program somewhere...  I'll try to find that and
post it  :)

Drew

On 7/27/08, Guy D2 <redacted@example.com> wrote:
>
> Andrew, thanks for the info. I wasn't aware of the PSIM-1.
> It looks pretty close to what I had in mind, yes. A bit outdated
> (mainly in UI execution) by now, and somewhat "too technical
> in its approach" - to my liking at least, but close, yes.
>
> How is the aliasing at very low frequencies ?
>
> I'll look up the Yahoo group. Thanks again.
>
>
> Can you explain me why this is a "sore point for many people out there" ?
> Because it's digital ?
>
> -gd2
>
>
>
>
> On 27 Jul 2008, at 05:32, Andrew Scheidler wrote:
>
> > I know it's a sore point for many people out there, but the PSIM-1 is
> > exactly what you're talking about.  I was looking for this same thing
> > right about when the first batch of PSIMs were made, and thanks to my
> > flood of questions and comments to the builder, I ended up with the
> > sixth one made.  Things got very messy after that, with people waiting
> > a long time for their (pre-paid for) PSIM.  Some are still waiting.
> >
> > All that aside, the module is cool as hell.  It is basically a Atom
> > processor inside, and 4 input jacks, 4 output jacks and a few buttons
> > on the outside.  There is a seriel port for a computer hook-up, and
> > you write the software in a version of compiled BASIC.  So you're only
> > limited by your imagination (and your programming skills).
> >
> > While you can use it as an LFO or an envelope generator, there are far
> > better uses for it.  My favorite programs are quantizers, sequencers
> > and other "CV processor"-type things.  The CPU isn't fast enough to do
> > high quality audio things, but it will try...  I made a program that
> > takes audio and reduces it to four bits, then outputs the four bits
> > (basically very fast gates) at the four output jacks.  Mix these back
> > together and you get some pretty gnarly stuff  :)
> >
> > There is a Yahoo group (Control Voltage Sources, IIRC) that is
> > building a "new PSIM" module.  If you're interested in this type of
> > module and are into DIY, you should definitely check out that group.
> >
> > Drew
> >
> >
> > On 7/25/08, Matthew Davidson <redacted@example.com> wrote:
> >
> > >
> > > On Jul 25, 2008, at 3:46 PM, Guy D2 wrote:
> > >
> > >
> > > > Is there a particular reason why the current crop of modulars is not
> using
> > > >
> > > digitally generated CV's for control modules like LFO's, EG's, S/H's and
> > > similar ?
> > >
> > > >
> > > >
> > >
> > > There are plenty of hybrid designs if you look around.
> > >
> > > The Doepfer MCV24 has software ADSRs and LFOs that can be output as CV
> > >
> > > The Buchla 200e is an extreme hybrid approach, freely converting analog
> to
> > > digital and back again. The elements exposed to the user is primarily
> analog
> > > (patch cords and such).
> > >
> > > mfb has some designs like the osc-01 that are digital inside, but use
> analog
> > > CV interfacing
> > >
> > > The Blacet/Wiard Miniwave is mostly digital inside, with analog CV
> > > interfacing
> > >
> > > Plan B is producing some hybrid modules.
> > >
> > > The AS RS370 polyphonic osc is mainly digital, but with CV interfacing
> > >
> > >
> > > Simple circuits like LFOs and S&H's are possibly easier/still cost
> effective
> > > to remain analog as a primary module. I haven't fallen in love with a
> > > digital envelope, ever, personally. This is something that is just more
> > > effective as analog for short transients.
> > >
> > > But, I do see hybrid designs as a solid future direction for modulars. I
> > > wouldn't mind seeing a digital module for generic slow control voltages,
> > > like LFOs and S&H CVs, etc.. You might be able to pack eight outputs of
> > > programmable voltage thingies in a cost-effective unit. It might also be
> > > easier to create an complex arbitrary break point function in the
> digital
> > > domain.
> > >
> > >
> >
>
>