Mister Grassi

COMZ · Post by **COMZ** » Thu Aug 25, 2016 9:50 am

Looks like Peter has a new IFM touch module, Mister Grassi. Looking forward to this one...

"Grassi, a touch-module, contains twelve square waves, used as the clock and data for shift registers, each followed by primitive resistor DAC. The DACs modulate clock and counter-clock wise, yielding closed loops of perpetual modulation, triggered by touch. Each of the six outputs are a single, four-bit DAC. Listening to them raw, they generate modem sounds to pure noise on touch. On release of touch, each DAC holds the contingent position of its DATA. Thus the DATA can be used as CV for up to six other operators, scrambled on touch. Touch->Scramble->Listen; Untouch->Hold->Feed

Grassi features a triangular hexagon, used for square-wave outputs (outer rim) and DAC triggers (inner core). Thus, a triggering touch should connect an outer station to an inner station, to begin the rungling process."

Manual http://synthmall.com/ifm/ifmGRASSI.pdf

ClausF · Post by **ClausF** » Thu Aug 25, 2016 10:11 am

Good to know...

rodrigo · Post by **rodrigo** » Thu Aug 25, 2016 5:50 pm

Oh man. Old Mr. Grassi is one of my fav instruments of all time, so this jumps right up to the top of the list of shit to buy!

I really really like that Mocante + Grassi case too.

wednesdayayay · Post by **wednesdayayay** » Thu Aug 25, 2016 7:19 pm

i love static CV sources and CL gear
I may have to pick this up to use with CL stuff rather than IFM

fluxmonkey · Post by **fluxmonkey** » Fri Aug 26, 2016 6:43 am

will jump on th grassi module as soon as its available!

yghartsyrt · Post by **yghartsyrt** » Sat Aug 27, 2016 8:19 am

woooooo

pugix · Post by **pugix** » Sun Aug 28, 2016 11:57 pm

Also interested in this.

Post by **Paranormal Patroler** » Mon Aug 29, 2016 1:24 pm

From what I gather this module acts like a T&H on random voltages being output while you keep your finger on the panel. There seems to be a trigger side of things (outer rim) and a voltage side of things (inner triangle) for all six outputs. Any insight ?!

I'm curious what the voltage range is and what the waveforms are. There are examples on the manual but I'm not sure whether it's a constantly fluctuating signal or something that starts only when you press it.

I also wonder how well this will work with other Eurorack modules.

dorkmorph · Post by **dorkmorph** » Wed Aug 31, 2016 1:27 pm

agreed, grassi looking v cool.

Hilarious though somehow to see paper circuit now in euro.

If it rungles like the benjolin then it will hold the cv of each output indefinitely until touched agian. I suspect those cv states could get pretty complex depending on the complexity of the touch modulation that happens. So maybe anything from lfo like sweeps to erratic s&h patterns?

touchable chaotic pattern generator

I'm sure that it won't work well with euro but will be a great way to scramble a well working rack lol

windspirit · Post by **windspirit** » Wed Aug 31, 2016 3:33 pm

Seems more like a bunch of square wave oscillators being stuffed into a couple of bit DACs, so you will only get stepped voltages even though itbwill probably sound somewhatvlike tones like thevold mr grassi when you touch it "the right way".

wednesdayayay · Post by **wednesdayayay** » Wed Aug 31, 2016 4:07 pm

this is actually a bit more in line with what I was thinking and hoping @windspirit

ym2612 · Post by **ym2612** » Tue Sep 06, 2016 9:22 pm

For some reason I never realized that the paper circuit version had rungling behavior. But of course, looking at it now, it has three CD4015 shift register ICs.

Anybody here ever build the paper circuit?

pugix · Post by **pugix** » Thu Sep 08, 2016 12:38 pm

I see that the IGM Keyboard with Mister Grassi is now available at synthmall and also control.

http://www.ctrl-mod.com/products/igm-ke ... ter-grassi

But I want just a stand-alone Mr. Grassi module.

I have a Mocante in the wood case, but I want to move it into a Eurorack case, so I can add Mr. Grassi and some support modules.

Summa · Post by **Summa** » Wed Oct 05, 2016 11:20 am

Yep, it's totally weird you can't order Grassi separately

Post by **Paranormal Patroler** » Wed Oct 05, 2016 11:22 am

Summa wrote:Yep, it's totally weird you can't order Grassi separately

I didn't know you were into CL stuff.

I'd love to see you get your hands on one and give us some feedback

Summa · Post by **Summa** » Wed Oct 05, 2016 12:15 pm

Paranormal Patroler wrote:
Summa wrote:Yep, it's totally weird you can't order Grassi separately
I didn't know you were into CL stuff. I'd love to see you get your hands on one and give us some feedback

I am, have had both a coco and plumbutter in the past, saving up for a full Ieaskul setup and would love to have mr grassi play with them

Summa · Post by **Summa** » Thu Oct 13, 2016 2:54 pm

short update from Peter B "Hi andreas, thanks for the interest. yes indeed soon i will have it but not quite yet!>>>> hang on! -peter"

Post by **Paranormal Patroler** » Mon Oct 17, 2016 2:36 pm

Summa wrote:short update from Peter B "Hi andreas, thanks for the interest. yes indeed soon i will have it but not quite yet!>>>> hang on! -peter"

Andreas, can you please explain why rangling makes people so excited ? I'm totally

by this one but I still think Mr. Grassi looks very nice so I'm very much interested to see if it's worth adding on my controller rack space.

Summa · Post by **Summa** » Mon Oct 17, 2016 4:17 pm

Paranormal Patroler wrote:
Summa wrote:short update from Peter B "Hi andreas, thanks for the interest. yes indeed soon i will have it but not quite yet!>>>> hang on! -peter"

Andreas, can you please explain why rangling makes people so excited ? I'm totally by this one but I still think Mr. Grassi looks very nice so I'm very much interested to see if it's worth adding on my controller rack space.

Well Konstantine

Have you ever tried a Benjolin? I'm not sure how the shift registering actually works inside that one, but it's one oscillator that "clocks" the other and feeds it back again. It's another controllable "random", there's really nothing else that resembles it, I tend to use the Rungle out of my Benjolin for other duties but if Mr Grassi adds hand-on control and manipulation to that it can only be good.

Post by **Paranormal Patroler** » Mon Oct 17, 2016 4:50 pm

Summa wrote:
Paranormal Patroler wrote:
Summa wrote:short update from Peter B "Hi andreas, thanks for the interest. yes indeed soon i will have it but not quite yet!>>>> hang on! -peter"

Andreas, can you please explain why rangling makes people so excited ? I'm totally by this one but I still think Mr. Grassi looks very nice so I'm very much interested to see if it's worth adding on my controller rack space.
Well Konstantine Have you ever tried a Benjolin? I'm not sure how the shift registering actually works inside that one, but it's one oscillator that "clocks" the other and feeds it back again. It's another controllable "random", there's really nothing else that resembles it, I tend to use the Rungle out of my Benjolin for other duties but if Mr Grassi adds hand-on control and manipulation to that it can only be good.

I googled up Rungling and came to the Benjolin but the examples are scarce, or meh. If you do get the Grassi please make a video. A "special" kind of random that gets people excited, even more so if it's a playable one, is nothing something I'm usually interested in but here we are.

thresholdpeople · Post by **thresholdpeople** » Mon Oct 17, 2016 5:21 pm

Paranormal Patroler wrote: I googled up Rungling and came to the Benjolin but the examples are scarce, or meh. If you do get the Grassi please make a video. A "special" kind of random that gets people excited, even more so if it's a playable one, is nothing something I'm usually interested in but here we are.

I don't know if they ever got posted to Muff's, but Pjay, who is a wiggler on this forum, had some really, really lovely Benjolin based tracks that he shared on facebook. I guess it was last fall/summer at this point... wow time goes quickly. I believe they were facebook video uploads, so it's sort of an unsearchable hole and for all intents gone now, unless he has them somewhere...

Dirty_Bill · Post by **Dirty_Bill** » Tue Oct 18, 2016 1:37 am

I'm Curious - as anyone contacted Peter about a standalone Grassi? He's usually pretty amiable to splitting things up.

Summa · Post by **Summa** » Tue Oct 18, 2016 11:14 am

Dirty_Bill wrote:I'm Curious - as anyone contacted Peter about a standalone Grassi? He's usually pretty amiable to splitting things up.

^^^5 posts above

Dirty_Bill · Post by **Dirty_Bill** » Tue Oct 18, 2016 12:49 pm

Summa wrote:
Dirty_Bill wrote:I'm Curious - as anyone contacted Peter about a standalone Grassi? He's usually pretty amiable to splitting things up.
^^^5 posts above

Oops, yes, it wasn't clear to me if this was a request for a stand alone or general availability of the keyboard unit as a whole!

ignacio · Post by **ignacio** » Sat Nov 05, 2016 11:42 am

Really giving Ciat's stuff a hard look. I am scared to go down a rathole, just like with anything euro. Nice thing is that these are standalone instruments.

MUFF WIGGLER

MUFF WIGGLER

Mister Grassi

Mister Grassi