Is CP-251 natively S-Trig or V-Trig??

[mashie]

Hi

Can someone please clarify whether the Moog CP-251 natively S-Trig or V-Trig compliant?

I have looked at the product spec and had a quick search of the forum and haven’t found the answer.

Most of the gate-outs on my equipment are V-Trig (Doepfer Regelwerk etc) and I want to know if I will need to make up a gate to S-Trig cable with 10k resistor and npn transistor?

Or maybe the CP-251 can accept both??

Thanks

[unfiltered37]

Why do you need to connect a gate through the cp? The cp has no trigger or gate inputs. The only thing I can think of to use a gate on the cp is either multing a gate, or using the lfo to gate an envelope. EIther way, s-trig is really not relevant, unless you are triggering old moog gear. I have been triggering my model D with the LFO and mp-201 using a 1/4" to s-trig cable with the resistor/npn/zener diode, but only because the minimoog only takes s-trig. I don’t know of any other gear, especially modern gear that takes s-trig.

[Voltor07]

The Micromoog and Prodigy have S-trig jacks, IIRC. Most vintage Moog gear through the late 70’s had S-trig.

[mashie]

[quote=“unfiltered37”]
Why do you need to connect a gate through the cp?
[/quote]

Yes, while the 25q will be predominantly used for cv, there are occasions when it might be useful to mult a gate, or sync the S+H.

From your response it looks like I won’t need to worry about S-Trig at all, which is great news

Thanks

[Roy]

@unfiltered37

Why do you need to connect a gate through the cp? The cp has no trigger or gate inputs. The only thing I can think of to use a gate on the cp is either multing a gate, or using the lfo to gate an envelope. EIther way, s-trig is really not relevant, unless you are triggering old moog gear. I have been triggering my model D with the LFO and mp-201 using a 1/4" to s-trig cable with the resistor/npn/zener diode, but only because the minimoog only takes s-trig. I don’t know of any other gear, especially modern gear that takes s-trig.

The gate on the CP251 is to trigger the sample + hold, so you can run the CV changes in time with sequencer or key press, very useful.

It’s v-trig btw.

[unfiltered37]

Ah, totally spaced on that.

[stiiiiiiive]

May I take the oportunity to ask anyone what is the difference between s-trig and v-trig?

[unfiltered37]

s-trig is a short between the two leads like on the minimoog, v-trig and gate are analogous i think, both are a 0v= off and 3v or higher= on

you can convert gate to s-trig, but I don’t think vice versa.

[stiiiiiiive]

@unfiltered37

s-trig is a short between the two leads like on the minimoog

I don’t know wether my english skills or my synth knowledge is involved but I cannot get that
Would you detail a bit?..

[unfiltered37]

If you have ever seen old moog gear, it has a plug that looks almost like a lamp plug with 2 prongs except smaller. The circuit is open by default, but when you short it,(both prongs are shorted to each other), it triggers the envelope generator.

http://www.synthesizers.com/gates.html

[stiiiiiiive]

Thanks, I get it now

[Voltor07]

@unfiltered37

s-trig is a short between the two leads like on the minimoog, v-trig and gate are analogous i think, both are a 0v= off and 3v or higher= on

you can convert gate to s-trig, but I don’t think vice versa.

You can also convert S-trig to V-trig.

[unfiltered37]

How would you convert a short to a voltage? I know there are modules that do it, but can you do it with just a simple circuit like with the s-trig to gate?

[Voltor07]

@unfiltered37

How would you convert a short to a voltage? I know there are modules that do it, but can you do it with just a simple circuit like with the s-trig to gate?

Not with a simple circuit, no. But you implied it was impossible…it’s not.