#655

Any tips how to use the envelope generator when there are no other modules with trigger outputs or control rate CV available? I only have the Voice panel (for now) and no other banana gear, so it feels a bit limited. Basically the only way I have used it so far is as an LFO or audio rate oscillator in cycle mode. And of course modulation of the different parameters at audio rate also works, but maybe there are some other tricks that I just haven’t thought of…

There’s also some weird thing that I don’t quite understand: I’ve been trying to use the saw output of the oscillator to trigger the envelope. But somehow it only works if the oscillators frequency is somewhere past noon. Maybe that’s the point where enough overtones are present to reach the voltage that’s needed to trigger the envelope generator?

#656

Yeah, the voice panel is somewhat limited in that way. It’s good paired up with something like an sq-1 to get some triggers going. The module selection is very much east coast in approach.

Regarding the triggers, I think audio being bipolar and +/- 2.5 volts is probably the issue, as the triggers want something higher?

#657

Yes, I was already looking for a used SQ-1 a couple days ago, but then I started my Arduino sequencer experiments, which might also be an interesting thing to explore a bit more.

Well, I hope that the other panels will become available sometime soon, already started saving some money and selling old gear :slight_smile:

#658

That was also my guess, but still strange that it works as soon as the signal from the oscillator reaches a ceartain frequency. Maybe I’ll get my oscilloscope later to investigate a bit more…

#659

Found this:

Trigger Happy
One of the interesting things about Serges is the wide variety of trigger sources, and how they’re used. Modules that need triggering include the sequencers, the Smooth/Stepped Generator, and the Random Source. On a Serge, trigger inputs want to see a ‘rising edge’. The sawtooth output of the PCO and NTO has a rising slope and falling vertical edge, so it’s unfortunately not suitable as a trigger source; not directly anyway. A DSG set up with a fast attack and slower decay, however, can be used as a trigger source. The faster the ‘attack edge’, the better. As the attack gets longer and longer, triggering may still occur, but it gets flaky and chaotic before it stops working altogether. For example, it’s cleanest to clock a sequencer from the rectangular pulse you get when you connect the GATE OUT and TRIG IN (or END and TRIG IN on older units) on a DSG. But you can also clock the sequencer from the OUTPUT jack of the DSG, as long as you set the RISE time to minimum (full clockwise), since it’s seeing those nice sharp rising edges. If you turn the RISE knob a little counterclockwise, the clocking action will become erratic."

http://www.serge-fans.com/wizardry.htm

2 Likes
#660

try using the sine/variable output (with the wave shape dial all the way up), put it through one of the waveshapers (also turned up) and out of the DC output (the upper one) and you should get something usable i think…

(new user here hello all)

2 Likes
#661

Welcome to the forum @yabuike :slight_smile:

I tried your patch idea, but it didn’t work as expected. The envelope generator only got triggered at the moment when plugging the waveshaper’s DC output in and out but not with every period of the oscillator (at least that’s what I thought would happen).

However, I just realized that the digital out pins of the Arduino can also be as triggers, which is just perfect!

Now I just have to figure out how to deal with the PWM aliasing and I got my cheap and simple DIY SQ-1 clone :slight_smile:

1 Like
#662

Since I’m not so well-versed in Serge, can someone explain why the NTO and the top half of the Dual PCO both have two 1v/oct inputs instead of just one?

#663

that’s funny - i don’t have a Voice panel at hand but on the Homebuilt I’m getting perfect staircases from the hold trigger with this setup (also works to trigger the cycle)! [edit: just tried and it works here even without the waveshaper just out of the sine DC output… weird]

anyway there’s a lot of cross-modulation possibilities on the Voice, what with the two oscillators and the TWS, even if it does only have the one EG… it’s worth experimenting with the waveshapers :slight_smile:

#664

Strange, so just to make sure I am doing the same thing: Sine DC out into EG start triggers the EG at the rate of the sine oscillator? Because I just tried this and it does not work, still only triggering when plugging in or removing the cable. And I’m pretty sure the modules should work the same in the Voice as in the Homebuilt system…

But: Plugging the oscillator into hold produces lovely staircases which opens up tons of new modulation possibilites, so thanks a lot for that idea :slight_smile:

#665

no, it doesn’t do anything with the start input here either, probably because that only triggers one cycle anyway - you have to use the cycle input, or indeed the hold input while you have the EG looping. have fun! :slight_smile:

#666

Ah okay, now I get it! Also, I just realized that the oscillator would have to trigger the EG at a rate that is lower than one cycle of the EG, since the EG cannot be re-triggered. So no wonder sine DC into EG start didn’t work…

1 Like
#667

Here’s an example of what can be done with a VCO with multiple 1v/oct inputs: https://www.youtube.com/watch?v=JYTCQ1zrtvc

1 Like
#668

So it just sums the two inputs together?

#669

yeah i think i’ll do the same - i would also like to build a format jumbler but it looks like the elby psu10
doesn’t have a grounded jack to connect to one like most psu’s do…does anyone know how i would go about adding one?

#670

There is definitely enough space on the PSU panel to add that on the DC input side. There are multiple places on the PSU’s pcb where you could connect it. What I did was to modify the boat to have a ground jack on the back. I connected it to the power distribution rail inside the boat.

1 Like
#671

ahh perfect. i think what i’ll do is add it to the psu

#672

Does anyone know of a source for blank panels in the 4x4 size? Are Buchla blanks a perfect match? I know LW blanks won’t work.

1 Like
#673

I need some help with the 73-75 reverb circuit. I’ve got a lot of buzz/ground noise, and the mix output section of the circuit isn’t working, but can’t work out where or what the problem is. I’ve been advised by a few folk to work through the schematic and check for continuity. But, besides checking that things that should be connected to ground, I don’t understand what I should be doing.

#674

hadn’t seen this before, most useful for R*S 4U, 73-75, Fritz/Uglysound, CGS, etc. owners
convenient source of info all in one place
(I think (co-)authored by R Luke DuBois?)

11 Likes