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paulovski
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Joined: 09/19/2012 - 06:13
A, very, basic, Modular keyboard split

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Don't get too excited. It's a, one side, or the other, thing. The oscillator, on the left, will play up to B3. The one, on the right, will play from C4 up. Don't expect me to explain, in detail, how, because I'm not going to. Basically, it's a poor man's comparator. They're used, amongst other things, by, most, analogue oscillators, to generate square waves. There's a simulation of how that works, on track 7. And, there's a few examples of what you can do with a split. They're, all, variations of the first machine. Feel free to adapt.

nitro27
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Joined: 10/11/2015 - 18:27
here's a similar thing in

here's a similar thing in fewer modules. the knob you need to turn to change the split point is marked.

explanation for those just joining us:
basically what's happening here is i want to run the note cv through a couple saturators so when it gets to a certain value it rails from one side to the other, with a static cv added to the input so i can change at what value that happens. to do that here is i've run the note cv through a bandpass filter, which for mysterious reasons inverts whatever goes through it. the negative note cv is run to a mixer where it's added to the mod cv, which will basically always be at the same value. by changing the amplification of the mod cv i can basically nudge the note cv one direction or the other, changing when it crosses zero and rails the saturators. from the saturators it goes to a crossfader which switches between the two oscillators.

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paulovski
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Joined: 09/19/2012 - 06:13
I love it, when that happens

I love it, when that happens :) One, minor, thing. It's not, quite, fully, cross-fading. A, bit, more gain to that, second, saturator output does the do. Pedantry for the sake of one, more, module. But, hey. I'm running with this one. Nitro strikes again :)

I've been doing a bit of filter research. It's amazing, how many designs invert the polarity of a signal. And it's, pretty, much a given, that state variables invert the low and high pass outputs, leaving the band pass the right way round. I'm making a guess that the input is inverted, before anything else happens, in this one. Speculation on my behalf.

paulovski
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Joined: 09/19/2012 - 06:13
Ooh. Back to five units. This

Ooh. Back to five units. This is one, mighty, switch.

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derrtiblu
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Joined: 03/08/2014 - 23:00
I like this concept idk if i

I like this concept idk if i will be able two use it. But i will apply.

SToons Music
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Joined: 03/01/2018 - 02:48
Very interesting thread,

Very interesting thread, sorry I missed it before. And sorry, paulovski, haven't even got to your new One Fold file yet, figured I'd start back at this thread first per your recommendation and go from there, wanted to see the basic building blocks first.

Long story short, started from the beginning of the Split circuit and sent each module output from the beginning into the scope to deconstruct, noticed there were a few not integral to the purposes of my initial understanding so removed them to make the circuit clearer to my little brain. Haven't even looked at Nitro's contributions yet, I now have alot of homework to do with all this stuff. And then of course got I sidetracked as you can see in the attached file.

I'm never sure whether to start a new thread (no idea what I'd call it) but saw some funny things along the way.

I'm still trying to figure out how it creates an almost square wave with no saturation... you likely know lol. And it's interesting how in some situations a signal is either unipolar or bipolar, it's like this instant switch with no in between, similiar to the necessary signal to trigger a SnH gate or sync generators.

Anyways, I don't want to derail the thread... but there are some things I saw along the way that to me are interesting subjects but have nothing to do with the topic, just don't know whether to do this here or in another thread. It's your call.

Oscilloscopes are my new main form of entertainment. Such wonderful images at times.

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paulovski
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Joined: 09/19/2012 - 06:13
Don't, even, bother, looking

Don't, even, bother, looking at the first one.

SToons Music
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Joined: 03/01/2018 - 02:48
Well I did bother and it was

Well I did bother and it was rather fruitful for me, personally.

So about the switch - that's some brilliant design you two came up with, I will definitely explore it, I can see it having many potential uses (I'm about to dig into the Derailed file, the Flam was super cool! Nice work!).

For others reading it is important to know that there are other options though, depending on the intended use.

Take keysplitting for example. Using an attenuvertor you only need 2 spaces and with automation it is much easier to control. It would be no small feat to, say, split alternating 16th notes by automating the mixer knob that controls the keysplit point with the Nitro Super Switch, with an attenuvertor it's a cup of tea. Plus it's very easy to perform blends as well.

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SToons Music
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Joined: 03/01/2018 - 02:48
Well, didn't long for me to

Well, didn't take too long for me to find necessity (thanks again you two!) for the switch. Long story short, I ended using it in an arp randomizer. Remember my probability stuff a while back? The Split is set for C3 (touchy little thing! Didn't have room in the instrument I used this for to set up a second attenuator). Anything above C4 is played. Anything below C4 is not. This way if the arpeggiator is set for 3 octaves then the "dead" notes won't bleed up.

There is a 5 note arp set to randomize. There are 5 notes set up from C1 to E1. So the probability of any note to play is 50%. Pattern 2 has the same arp but only one "dead" note so 80%. Not that I generally care about percentages, its all about the end result.

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