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mysteryroach wrote:Btw. In your opinion, (if you have a rough idea off-hand), how much does adding inputs to a TRS splitter like that complicate it? (when there's lots of outputs) As you said, I don't want to push the envelope too much. I told the dude bout the midi merging/splitting - that if it's too much hassle, then I can leave it out. Sounds like that isn't particularly complicated though.
crochambeau wrote:Like a joystick?
mysteryroach wrote:On the other hand, that input needs integrated with the rest, and I do not know how that is happening.
digi2t wrote:Go MIDI.
https://www.robot-electronics.co.uk/htm/midi-rly8.htm
I used something similar from Highly Liquid years back for an A/B/Y stereo switcher. Worked like a charm. If your builder is having trouble getting his head around MIDI, and MIDI is what will make your life easier, than switch builders.
mysteryroach wrote:What about the switches that click back into the central position when you switch them. Is there one like that that does it in 4-directions? Up, down, left right. That way if it's going back to center, I have access to any of the 4.
crochambeau wrote:Okay, as someone who has taken on a project from a friend that started out as a loose and cool but poorly defined concept piece that proceeded to go full nightmare, let me attempt to help you and your builder out.
The root device here is a patchbay for 1/4" TRS connections, which will carry either resistive expression reference or CV expression reference needs (depending on pedal) from the eight "output" jacks, and allow selection via switch per channel to reference either a CV generator or a resistive treadle expression pedal plugged into the "input".
Am I comprehending the project criteria so far?
mysteryroach wrote:Having said that, it may be nice if can handle both CV and expression and be able to route either type (CV or EXP) to the devices outputs based on what signal it is being fed. Can you enlighten me if this presents any complications so I don't present this as a potentially unreasonable request to my builder. Would it automatically be able to detect whether the input device is CV or expression? Could do it based on whether a TS cable is plugged in or whether a TRS cable is?
in my understanding some expression circuits supply a reference DC voltage (CV) that is divided at the expression potentiometer and returned to the pedal as a CV voltage that the pedal comprehends as useful and does its thing
mysteryroach wrote:Wait, so are you suggesting that the voltage from one of the effects pedals (i.e. one of the outputs), might bleed back through into the splitter box, and into the other outputs?
mysteryroach wrote:So was I mistaken when I thought you were saying there might be issue an issue with the expression pedal? (i.e. one of the inputs) Were you instead saying there's an issue with the internal voltage of the effects pedal that the expression pedal is controlling (i.e. making too high for the other pedals that the voltage might bleed into).
mysteryroach wrote:One of my pedals is 0-10V CV/EXP. If I have that as an output on the splitter, when I use an expression signal on it, if it's making the voltage on the effects pedal go to 10, will that then go into all my 0-5V CV/EXP gear and fry it. I.e. will I have to put overvolt protection on anything less than 10V if this pedal is one of the outputs (no matter if the expression pedal is completely passive).
mysteryroach wrote:Yes, I was hoping to run it into more than 1 pedal at a time and was my intent from the getgo. Either setting it individually for each output (preferred), or a switch before it that chooses which one goes to ALL outputs (less ideal).
mysteryroach wrote:I have emailed the guy at Voodoo Lab about if there's any issue doing switching (pre-splitter) through the GCX. At the very least, if it's a dumb idea he'll get a laugh out of it.
mysteryroach wrote:Re: flipping. Most of what I want to use with it will be there forever. Most of that is already 0-5V. There are a couple others that will also be there forever. One 0-3.3V CV + EXP. One 0-10V CV + EXP. Others I'm less certain about. I have my eye on some other 0-10V CV + EXP ones. Might be a while till I can source them, but they'll likely be kept.
If voltage is gonna get into the circuit anyway even if I use 100% passive expression (if not and I've misunderstood, disregard), and I have to have circuit protection anyway, is it any additional complexity to have the device accept CV as an input?
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