#1276

@jlmitch5 I can’t say that might not be able to get something interesting out of this as a guitar pedal if you go at it in a circuit bending way (connect 1/4” sleeve to ground and try connecting the signal to each and every point) but I think you’re asking this to do something it’s not capable of doing.
Here’s Peters description of the circuit from the ROLLZ-5 page:

“I originally intended to control the light box with some slow triangle forms, and the circuits evolved from there.

The Piezo Preamp adds an element of touch. If you embed a piezo in a suitable surface, such as the slit-drum (which isolates the vibration from other piezos), you can make pulses by lightly tapping it there. The preamp adds a decay to them as well as creating auxiliary pulses. There is a compliment to the Preamp, appropriately called “Antipreamp”, which creates an inverted signal.“

If you don’t include the piezo and connect the input up in its place, you might be able to trigger the pulses with a guitar signal. Try removing the 10M resistor. Try for output at the star (don’t forget to connect to ground).
Good luck and have fun!

2 Likes
#1277

thank you! when you say 10M, I think you mean 2.2M right? the one attached to the piezo?

#1278

Yes, sorry the 2.2M not 10M.

1 Like
#1279

been working on planning out an expanded version of gerassic organ that is in a vaguely Critter and Guitari-like form. Here’s a mockup of the interface I’m thinking, does anyone see anything I’m missing or other ideas? Or just general thoughts?

Gerassic Organ Expanded Mockup
Gerassic Organ Expanded Mockup1081×740 75.2 KB

big thanks to @mlogger for helping me figure out these paper circuits and providing PCBs, @Raoul for the inspiring instagram trigger-in idea https://www.instagram.com/p/CBglAaWhx06/, and @brianleu for helping me learn more about circuits and prototyping in falstad.

EDIT 1:

Here’s a revision 2 of the expanded gerassic organ. Got some feedback to move some things to the back to help with making it shallower. No idea how difficult the circuit is on the decay control, I’m going at it from an “ideal” first:

Gerassic Organ rev 2 Expanded Mockup
Gerassic Organ rev 2 Expanded Mockup1085×811 88 KB

EDIT 2:

cc @barnjazz

Figured out a good circuit for the gate in/buttons, I think. Simulator here Thanks again to @brianleu for all the help and @pichenettes for the MI schematics (check those PDFs out on the mi website, they are soooo helpful).

I took the marbles gate in circuit, added a transistor/resistor inverter circuit, and then the 4077 chip to XOR button and gate in logic together. The XOR is cool because the button basically acts as an inverter to whatever is happening on the gate in…so when the gate in is high, the button acts as a “mute” for that particular channel.

One of the resistors seemed to act as a threshold that can change the voltage at which it causes the transistor to flip and the gate in circuit to go high (see the slider on the right of the simulator to mess around with that)

EDIT 3:

Revision 3 of the mockup is released (moved columns with ins to all be on one side. the gate in section has been breadboarded and tested out.). The @barnjazz knob rules, thanks for that suggestion! Up to date simulator for this circuit here

Gerassic Organ rev 3 Expanded Mockup
Gerassic Organ rev 3 Expanded Mockup1085×811 91 KB

EDIT 4:

Revision 4 of the mockup is released (no more stuff on the back, master pitch knob with touch contact vibrato)

Gerassic Organ rev 4 Expanded Mockup
Gerassic Organ rev 4 Expanded Mockup1130×804 91.6 KB

13 Likes
#1280

woah!! this would be so awesome. would definitely definitely be interested in a PCB.

my only request would be that it can be triggered by rollz - it looks like it’s probably set up that way already, but just want to be sure.

also this may be overkill but adding cv-controlled decay might be nice? i agree with keeping pitch knob-controlled for simplicity’s sake.

2 Likes
#1281

good thought. does anyone know what voltage the rollz output? The idea of the 5v threshold was pretty arbitrary, it maybe should be lower, or maybe configurable by trimmers.

This is a cool idea. The decay is the x resistor, so I’d have to figure out how to make a circuit where voltage controls resistance amount, I guess? The other thing I was thinking of that could be cool is some way to turn it into an infinite sustain switch for drone notes, but I don’t really know where to start on that idea at this point.

Would love to be able to do that one day! But do want to raise the disclaimer that I’m super early into my circuit understanding days, let alone pcb design, so if it does happen it will probably be a longgg time from now. Luckily I have some friends who have been helping me understand more, so it doesn’t feel so daunting it’s impossible

1 Like
#1282

this, and/or extending the decay range to max out at several seconds long would be awesome. the decay on my organ is very short even at the longest setting (though maybe that has to do with faulty building/component choice on my part).

2 Likes
#1283

I need to mess around on the broadboard or see if i can figure out how to get a working emulation in falstad simulation of the diagram mentioned above with the 4067 chip excised out. maybe it’s that electro cap connected to the x resistor that sets the max decay in relation to the x resistance? I don’t know just a hypothesis.

https://llllllll.co/uploads/default/original/2X/0/068c3bc42d66cb1661b05ba690572d052f077343.JPG

#1284

I’m curious if anyone knows what sort of voltage outputs come from the conrad papers modules (swoops, anti swoops, randos, anti randos)

i’m curious about interfacing these with other synths but alot of them don’t accept negative voltages and i don’t have an oscilloscope to test to see what exactly they’re doing

#1286

Peter Blasser will be on Hainbach’s next “Single Malt Synthesis” live stream (this Friday at 21:00h CEST):

Looking very much forward to this!

22 Likes
#1287

Yeah, Hainbach mentioned this in oi nstagram and I couldn’t believe it. Looking forward to this show too.

3 Likes
#1288

Has anyone ever experimented with using Ciat gear to drive DC motors? Is such a thing even feasible? I have no DIY electronics experience whatsoever, but was just thinking of how great it would be to have rollz or av dogs modulating a motor’s rate.

2 Likes
#1289

The closest I’ve seen is solenoids upthread:

CL-driven motors gave me a mental picture of Rollz-controlled bumper cars, which I’m sure was not your intention, but fun/terrifying to imagine nonetheless.

2 Likes
#1290

Starting to veer off-topic but watching Rollz-controlled bumper cars (now I also imagine Ciat-Lonbarde mechanical pinball machine with too many balls) would probably help me understand how voltage gets routed around something like the Plumbutter.

#1291

Just a note, rather than litter this thread with updates on this gerassic organ stuff I’m doing, I’ll just keep the top post updated. Happy to answer questions or discuss any ideas in the thread, but figure it’d be nicer to keep the “dev journal” going in one place.

#1292

@ParanormalPatroler brilliant episode of SMS, and thank you for asking about the Shnth — I don’t know what he meant by the [square brackets] and < carrots >, sorta sounds like macro presets separate from the {scenes} which could be really cool… :open_mouth:

PS can you tell us more about that “press” module, I know this isn’t CL related but it’s impossible to find a module called “press” by a company called “software synthesis”—perhaps the most ungoogleable combination of words haha :slight_smile: EDIT: it’s “softwire synthesis” just caught it on your instagram :stuck_out_tongue:

1 Like
#1293

Full video ‘Single Malt Synthesis chat with Peter Blasser’ now up on YT:

10 Likes
#1294

Here is a mildly amusing anecdote involving CL instruments just doing their thing and low effort remixing.

When I first got my cocoquantus I hooked it up next to the plumbutter and looked around the desk for some audio to fill the buffers. I spotted a cassette of stems I had dubbed from a house music track that a friend had asked me to remix. I played them in and started fooling around with flip and skip. It sounded pretty weird so I pressed record and sent a phone vid to the artist for a laugh. “Working on that remix ;)”. They replied “I hope you’re recording that”. I gave it a quick “master”, uploaded it, and promptly forgot about it.

One year on, I never finished my grandiose overwrought ultimate dance remix. Never even got it moving in a promising direction really. My coco-noob hello world sketch made it on the remix compilation though, and actually having been completed, it is objectively the best one of my remixes for this project.

There are probably several important lessons to be learned from this experience, but I doubt that they will make a lasting impression as I currently lack ambition for anything other than playing my bongos and drinking sparkling water.

9 Likes
#1295

Nice one! Is that plumbutter on there too?

#1296

yes it’s just PB and CQ