Quote:
Originally Posted by
lineofcontrol
β‘οΈ
I too really don't understand the usefulness of VCA's. I have a Linux mixer with the 5 VCA's and I really just use them for audio/volume mixing.
And as I have said before I basically use my eurorack setup in a very standard subtractive synth way and melodic-ally just to inject different sounds into my workflow.
I read your above patch explanation and besides the fact that I don't have a lot of the kinds of modules that do what you would need to make this happen... I don't get why I just wouldn't use my sequencer to make a patch like what you showed?
I am genuinely curious to discuss these things. And am very appreciative of your clear explanations and sound examples. So thank you.
There's nothing wrong with using a Eurorack in a subtractive synth style because you have so many "plug and play" opportunities. But figuring out different ways to control those "plug and play" items really opens up a completely different world that one can't get from a subtractive synth.
You don't necessarily need the same modules I have - you have the basics of what you need in your Linux mixer with 5 VCAs. I'm assuming you've got some LFO possibilities in there as well? You could even use envelopes if you don't have LFOs. There are really two keys to the patch I created, which is still a very basic patch. (I keep thinking of ways I could have made it even more interesting) The first key is the trigger into the quantizer, telling the quantizer when to quantize. (I don't remember exactly now, but I believe it was either a multiple or divisible by the primary clock that was gating the envelope - I'm really coming to appreciate clock divers/multipliers now) The second was the type of LFO modulating the square waves and the tempo of those LFOs. I chose Batumi in phase mode, but you can really use any combination of LFOs in any tempo - just find something that produces results you like.
When the quantizer quantizes the incoming CV for the pitch, it's taking a combination of those three square waves, whatever they are. As you start turning up the gain on the VCA channel attenuators, you're starting to get additional pitches out of the quantizer as occurred early on in the example. Next, modulating the squares with other LFOs, the level of the CV out is different and it's not merely "on" or "off" as a square wave is. So now you're getting different CV values for the incoming quantizer, resulting in the pitch differences, and the "melody." There are a number of things I could have done to spice up the patch further: 1) increase/decrease or continually change the speed of the modulating LFOs 2) use different waveshapes (how does ramp sound vs sin vs saw vs triangle, etc) or change the waveshapes mid-patch - something like a random waveshape would produce an always changing melodic sequence. 3) take an LFO through a sample and hold and modulate the time of the trigger of the sample and hold, then use the S & H output to modulate one of the square waves. 4) reset the LFO or envelope at different times mid-cycle and/or change the trigger point of the reset or envelope gate. 5) rectify the modulating LFO so it's always positive when modulating the square. 6) take the rectified modulating LFO output and invert it, then modulate the square using the inverted signal. 7) take a combination of the above and run through a switch!
It's true that you could just use a sequencer to generate your melodies. But what happens when you want another voice sequenced and you're out of sequencers? Maybe you want to just switch up the melodic line on occasion and you don't have any random capabilities on your sequencer. Maybe you'd like some change in your sequence, but want to concentrate on wiggling things such as LFOs or effects. Now you could take a similar patch, or even a smaller one with just one or two square waves, perhaps through offset or modulated with some other LFO or envelope and add that to the pitch of the sequence, just to change things up a bit.
I recommend you try this on your system. Take your sequencer, play it a bit, find a sequence you like, then take a square wave through a VCA, out to an offset or attenuverter or both. Now combine the CV of the sequencer and the square output from the VCA either through a mixer or precision adder. If you don't hear any difference, increase the attenuation of the VCA on the square wave until you hear a difference. If it's too much of a difference, adjust the offset to get to a point you like, then fine tune the attenuator on the VCA for the square. Get something you like there, then add in another LFO to modulate the square. If you have a quantizer with a trigger, it's best because then you don't get slide-type functionality you would in this example. Now increase the speed of the modulating LFO. Now reset the LFO on occasion mid-cycle.
OK now, imagine you can use this "mini patch" elsewhere in your system. Do this on the V/Oct on your Rings or Clouds. (everyone has one of these, right?

) Use this modulated square or mix a couple modulated squares together and take the output to freeze clouds or trigger clouds. Hell, use it on any of the inputs on clouds or rings. Don't forget to play with the modulating LFOs shapes and speeds. Try modulating the squares with the outputs of a S & H. If you have a non-random ASR, "record the sequences of these outputs" at various times, then change the tempo or reset the thing clocking the ASR with the outputs of the ASR going into modulatable inputs.
And after you've tried all of these things, go back to step one and use audio rate modulation of the square wave and see if you like that.

Don't forget to change the pitch of the audio doing the modulations.
Granted, I didn't come up with any of these on my own. I get these ideas or concepts from scouring threads here, on muffs or watching youtube videos. (mylarmelodies has some fantastic learning resources on youtube) The "Today my discovery was" thread at muffs is full of fantastic concepts I would have never thought of. I also research how people are using some of the modules I have, or watch the youtube videos on those modules frequently. Just recently I was made aware that I can use the WMD SSM with the expander as a trigger sequencer and not merely a switch - seems like a "duh" moment, but I hadn't conceived using it that way. The Allen Strange book is also great in providing different ways to do things, but most importantly that merely by thinking differently with your modular, there are tons of possibilities. There are also some threads on muffs on how to use certain types of modules. I didn't get how great sample and hold could be until reading through some threads on how to use sample and hold, then playing around with those ideas on my system - now mind is blown with all the possibilities of sample and hold. Same with an Analog Shift Register - random output or outputting incoming CV. I'm not creative enough to come up with this stuff on my own, but once I've tried it a few times in my system after getting the idea from someone far more experienced or creative than I, it clicks.