#819

tasty. does 9v instead of 12v affect the signals it chucks out?

#820

Hainbach’s new record makes me want a Deerhorn.

2 Likes
#821

Finished up my rollzer-lite. 3 tempos (rows) with a 3, 4, 5 and 6 roll for each.

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27 Likes
#822

wild! did you lay out the PCB yourself?

2 Likes
#823

Do you know if it’s possible/safe to just replace that with a guitar pedal adapter?

#824

9 seconds in on demo 4 your making a almost exact sound from the video game Galaga.

2 Likes
#825

Thanks! I did the layout on perfboard/breadboard.

3 Likes
#826

I imagine so, as Mr. Grassi doesn’t seem to mind lower voltage. I do know my oldschool Fourses/Fyrall sound nicer when I used an adaptor, but I do tend to get ground hum when I touch stuff, so that may also be the case here.

For my Rollz-5, what I did was copy/make one of Peter’s power suppy designs (from the design papers of the Fourses) and run the power through it going to the rest of the circuit. I didn’t really do any before/after testing, but I thought it would be good to do.

1 Like
#827

yeah, I’d be hesitant to have touch capacitive stuff hooked up to the mains. Much safer to go with a battery.

#828

Amazing, this the exactly what I’ve wanted for ages. I’m using my rollz but would love something more compact.

2 Likes
#829

Ok, so I received a Quatrax yesterday evening. A couple first impressions/notes:

-Maybe obvious, but it’s pretty damn long. I found it a bit hard to play the entirety cohesively while it was all patched up, but not too bad. One (or I guess two?) could probably duet on it, though.

-I scoped the timbre knob and it’s saw (ccw) to triangle (middle) to reverse saw (cw). The timbre knob also changes frequency, with the saw being in the middle , triangle highest, and reverse saw lowest. Interestingly, the individual tuning sliders change frequency AND timbre as well, so multi-timbrality! I’d guess this is what makes it more than a double Sidrax?

-The third green jack is another glitch jack- I confirmed that with Peter. I’m not super familiar with the Sidrax/Tetrax to say how this new one is different, but they all sound cool. I don’t think there’s CV control over timbre as far as I can tell.

All in all, super fun so far!

2 Likes
#830

That timbre knob and barre sliders behaviour makes it sound more like a massive tetrax than a sidrax to me. Which is very exciting!

2 Likes
#831

For all you Peterheads. Released today is the work of SqrtSigil (Poland). Esoteric recordings of various Ciat Lonbarde designs.

https://purlieurecordings.bandcamp.com/album/materia

5 Likes
#832

kind of a x-post but: the snare on my pb2 suddenly became very quiet, near inaudible, while in use. mixer level is fully cw. not sure why, doesn’t matter what I have patched into the green jack. seems to get quieter throughout use. should I bother Blasser with this? any advice on what might be causing the drastic signal drop would be very much appreciated. I’m using 9V battery for power.

#833

I’m pretty sure the issue is the battery- they seem to be more a fun alternative than a direct replacement for a PSU. It’s been a while since I used a 9V in a PB, but I think the snare was the most drastically effected.

1 Like
#834

Yeah I remember the snare being unusable on battery power.

1 Like
#835

I have the opposite issue. My ‘snare’ is waaay louder than the rest of the modules. At approx 10 o’clock it’s like a maxed out gong (which is low, espacially in the low pitches).

#836

I could be wrong as I’ve not used it in a while, but it feels like the volume varies each time I start it up?

I could have unintentionally used it with different power supplies, but I guess it’s also possible that it has some kind of random seed when it starts up?

1 Like
#837

9V as salient causal factor seems to be the consensus—thank you. wishing it was an adequate substitution for a wallwart but whatever.

might just be the nature of the circuitry—I’ve noticed with different PSUs that the rolls operate at slower/faster speeds depending on how much or how little power is supplied (which I think is great).

#838

Inspired by @sbaio’s Rolzer and thanks to @corpusjonsey’s schematic I built one too :slight_smile:

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I put LEDs on the odd rolls too, I like how they “follow” the even rolls when cross-patched.
Here it goes to 4 ultrasound filters :

I used 2x3 headers inside to socket all the Rollz but unfortunately they aren’t reliable and caps keep disconnecting randomly (in the video the 2nd 6-Rolls doesn’t work as just one cap doesn’t make a good contact). I built everything on strip board and I’m not sure I’d succeed removing all those headers so I’m gonna build another with fixed caps later and keep this one just for experimenting with weird values.

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Next experiment will be taking the positive pulse outputs to a DIYed Olegtron R2R used as an 9-bit DAC to derive a CV value from the Rolls, can’t wait to have some free time to do this!

Edit : I used cheap banana sockets from aliexpress, nice thing about them is that they work with touch too :slight_smile:

33 Likes