Post by keurslagerkurt on Apr 8, 2021 15:50:47 GMT
Was toying with my 1-row rack and I wanted a way to make arpeggio's out of my saw/triangle LFO's etc, because adding a SEQ takes a lot of rack real estate! Ideally wanted to design something that would fit in 1U.
So started to try and design a circuit, and here we are: a working breadboard prototype!
It lets you set ascending CV's with 5 pots, and depending on the input CV, you jump between those CV's. So for example, you can make a rising arpeggio with a ramp LFO, or a back-forth arpeggio with a triangle wave! The root note can be set with CV in & a pot.
Very simple patch to demonstrate: saw from 2LFO goes into the arpeggiator. Arpeggiator goes through Quantizer to make the notes more melodic, and to generate triggers for the notes envelope. The note CV's go to the 2Osc saw wave. The fun thing that makes this great (at least i think its great) for generative patching: I use the RBSS to generate random voltages which change the arpeggio root note! So you get semi-random, but melodic, different arpeggio's! (hope this link embeds)
So I also designed a circuit (& tested it in software) that outputs triggers each time the arpeggiator makes a 'jump', so you could use it to trigger envelopes, making it a very versatile circuit. But this would probably no longer fit in 1U. Right now I used the basic circuit with the Quantizer triggers, which is basically the same thing, but it means you need the quantizer as well of course. I'm contemplating whether this extra functionality is worth going for 2U and maybe add some more stuff. Or I should try and go the modern way: maybe it still fits with a tight SMD build?
Another video using some different CV sources to create the arpeggio's:
So started to try and design a circuit, and here we are: a working breadboard prototype!
It lets you set ascending CV's with 5 pots, and depending on the input CV, you jump between those CV's. So for example, you can make a rising arpeggio with a ramp LFO, or a back-forth arpeggio with a triangle wave! The root note can be set with CV in & a pot.
Very simple patch to demonstrate: saw from 2LFO goes into the arpeggiator. Arpeggiator goes through Quantizer to make the notes more melodic, and to generate triggers for the notes envelope. The note CV's go to the 2Osc saw wave. The fun thing that makes this great (at least i think its great) for generative patching: I use the RBSS to generate random voltages which change the arpeggio root note! So you get semi-random, but melodic, different arpeggio's! (hope this link embeds)
http://instagram.com/p/CNaOfXvBo-X
So I also designed a circuit (& tested it in software) that outputs triggers each time the arpeggiator makes a 'jump', so you could use it to trigger envelopes, making it a very versatile circuit. But this would probably no longer fit in 1U. Right now I used the basic circuit with the Quantizer triggers, which is basically the same thing, but it means you need the quantizer as well of course. I'm contemplating whether this extra functionality is worth going for 2U and maybe add some more stuff. Or I should try and go the modern way: maybe it still fits with a tight SMD build?
Another video using some different CV sources to create the arpeggio's:
http://instagram.com/p/CNaJOoNhQER
Attachments:
It's actually extremely simple, it's just pretty big on the breadboard because it has four times the same parallel circuit.
