x0xb0x Gate to Pro One

[JRock]

I tried to use the x0x's CV/Gate to control my Pro-One but it seems like it never comes down...?
I was able to use the audio input but it don't work nearly as well as a CV/Gate. The CV works great but I hate to have to use a workaround when the x0x is specifically built to send CV/Gate..
I've added a 2VCO and some other mods but I don't think any of them should affect the gate...
Anybody else know about this?

[Computer Controlled]

Could be the gate isn't hot enough for the Pro-One???

[JRock]

I'll buy that. Thanks.
Another question... (just out of curiosity...)
Where does the gate enter the signal? It kinda sounds like there's no gate when I run the VCO out. But at the output it sounds normal. I haven't listened to the VCO out with the tempo turned way down (as far as I can remember..)

Also if I run a signal into the VCF in it seems like it's gated. Probably the envelope though. Shouldn't the VCO be gated?
Anybody run the VCO out? Can you hear the gate close?

[phono]

pretty sure the pro one needs around 5v for gating so i think the x0x shoudl cover that, it could be a polarity issue or a cable problem or even a machine problem.

first things to do, get a meter and check the gate out on the x0x, write down the result. Then meter the gate out from pro one (this should tell you what level the gate needs to be) Also make a note of the polarity. If they both match up, check cables etc. Then look at the jacks, i had an arp odyssey on my workbench that had a similer problem, turns out someone had wired a new jack in but backwards. So its always worth investigating these things since its an old machine. I've found crazy stuff inside of some machines at work, like hidden treasures (really a box taped inside a pro vs) and all sorts. All old synths have some history, so it's always worth a check

[Computer Controlled]

Yup, according to the manual, it's a +5v Gate. So the x0xb0x will cover that easily. Try different cables. If you're using some radio shack 1/8" to 1/4", they might be wired wrong. Or it could be the Pro-One's Gate input is wonky. As Phono suggested, measure the gate out of the x0xb0x and P-One. Also, if you can, try different machines to control the Pro-One.

[JRock]

Yeah! my bass station worked well but something happened to the midi on it... I have yet to get around to that. The Pro-one is puttin out 4.9 which is right...
The x0x is gating at 11.6!
I wonder what I did to it? Everything else seems to work as it should.
I know my PSU runs slightly hot but it shouldn't juice it up like that...
I've never used the gate out so maybe it was always like this ooorrrr I tweaked something while I was fiddling with it. Too late to open it up tonight...
Guess if I get a chance i'll head over to the wiki 2mw.
Thanks for your responses.

[phono]

Yeah! my bass station worked well but something happened to the midi on it... I have yet to get around to that. The Pro-one is puttin out 4.9 which is right...
The x0x is gating at 11.6!
I wonder what I did to it? Everything else seems to work as it should.
I know my PSU runs slightly hot but it shouldn't juice it up like that...
I've never used the gate out so maybe it was always like this ooorrrr I tweaked something while I was fiddling with it. Too late to open it up tonight...
Guess if I get a chance i'll head over to the wiki 2mw.
Thanks for your responses.

i think the x0x output is fine tbh, what happens if you loop back the pro one gate out to the gate in, if that doesn't work you know the problem lies with the pro one gate in

[JRock]

I guess they're just not compatible...
The Pro-one gates itself perfect. What gate does your x0x output?
The Pro-one is set up to receive 5v (pretty standard right?) and my x0x puts transmits 11v gate signal.
I'll have a look in the wiki and see what it's supposed to be...
Thanks

[JRock]

Checked the wiki and I can't find what the gate pulse is supposed to output...?
What does yours output phono?

[jfx09]

I'm following this with great interest too as the ability to trigger my Pro-One with the x0xb0x was an important selling point to me.

[JRock]

I imagine a stock x0xbox would have no trouble triggering a Pro-One. I may be mistaken but I think SCI, Roland and ARP are compatible. That's what my Bass Station manual says. I know my Pro-One triggers @ 5v and I think that's pretty standard (correct me if I'm wrong). Then again the trigger pulse out of my 606 is closer to 14v. But that's not the same as a gate pulse.(I think) I'm certainly no expert though. I'm still pretty new to this stuff and have a lot to learn. I'm wondering if I changed something when I was fiddling around inside of it. I added a VCO out - VCF in with 2 switch jacks (one for each) and I was pretty much winging it. I also added the VCO2. And a few other mods. I was able to follow the directions in the wiki, get help from the community and figure a few things out but I still am just beginning to understand why this stuff works.
This is just my first occasion to use the gate out. I haven't checked it before now.

[jfx09]

mmm, difficult for me to say, since i don't have a built x0xb0x to test right now, but one thing for sure is 5v will trigger the Pro-One. I have done this with the Doepfer Mcv-4 and also a Roland sh-101, no problem. So maybe your problem lies with your Pro-One gate input. i know how insulting and everything this can sound like , but, it can happen : check your gate input jack with your dmm set to continuity. Sorry if you already did that and I did'nt catch it in thread.

jf

[JRock]

Not insulting. I appreciate the input. I would like to get this straightened out. The x0x sounds awesome by itself and the Pro-One sounds awesome by itself but I would like to have the option to run the one off the other. Also the keyboard on the pro - one is notoriously bad (I have the membrane type) and the x0x makes a handy CV/Gate converter.

I checked with my DMM and the circuit is open. That's what you mean by testing for continuity?

Like CC said, I think the gate signal on my x0x is too high. My x0x gate pulse reads 11.5V. It's so high that the Pro-One gate never gets to close. The CV seems to be normal.

I would love to hear what other people's x0x gate out reads.

[jfx09]

Hello again,

rereading the thread I am a little bit perplex: what do you mean by :

The Pro-one gates itself perfect

You would really need an external gate/click signal in order to test the gate in as the pro-one can't gate itself. Maybe your reffering to the cv ?

Also, is the gate out of your x0x continually at 11.6 v ? or does it go from 0 to 11.6v in time with the sequence ?

11.6 v is very normal i think, that is what i measure from the sh-101 and being machines from the same time, i'd be surprised if they had widely different outputs.

jf

[JRock]

Now we're gettin' somewhere. I plugged the gate out to the gate in like phono suggested and it worked fine. The gate signal out from the pro - one (on mine) is 4.9v or something like that. I still have to double check the polarity. What does the gate out measure on your pro - one jfx09? I guess my x0x is fine. It worked fine with my bass station. I'll have to check that too.

I'm not sure if I'm being clear. The x0x will trigger the gate so it opens but it won't close. It just plays until the decay tails off. It plays if I turn the sustain all the way up on the VCA but the envelope does not get retriggered with the next note. So the Filter and the envelope are static.
The same thing happens when I use the Audio input and I have the signal too high. The gate never closes, therefore it is not allowed to trigger again.

I will have to check again if the x0x gate is continual or it closes. It does for the audio. I don't remember if it does for the gate out. I just checked it the other day too. Maybe too much accciiiiiddddd....posting.php?mode=reply&f=7&t=15568#
Thanks