Is It Safe To...?

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Is It Safe To...?

Postby Bane » Wed Jan 16, 2013 9:08 pm

Hey,

I have a routing scenario that I am wondering whether it is safe on my audio interface.

Guitar > Rocktron Amplifier Input > Amp Headphone Output to interface 1/4" Input

Since my CI unit has preamps, just trying to figure out if this could be a dangerous connection on my equipment. What do you think?
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Re: Is It Safe To...?

Postby Split » Wed Jan 16, 2013 10:50 pm

Not a problem, it'll be fine. Just remember 1/4" stereo headphone output to 1/4" balanced mono input!

So if you put a normal signal lead (unbal) into the headphone socket all the way, it'll short out one side of the headphone amp!

It's alright to put an unbal 1/4 into the soundcards input it'll just unbalance it.

You can bodge the headphone plug by not putting it all the way in into the socket, so the tip only engages the first indent, thus tapping only one side without shorting the other.

Otherwise you would need to wire a suitable jack using a stereo plug wired for one side of the headphone output to a mono (unbal) jack for the pre input.
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Re: Is It Safe To...?

Postby Split » Thu Jan 17, 2013 7:38 pm

oh yeah, i was forgetting about Y leads :lol:
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Re: Is It Safe To...?

Postby Bane » Thu Jan 17, 2013 9:15 pm

Thanks for your time guys.

Right now I would be using a generic guitar cable to connect the guitar to the amplifier, and a 10 ft Hosa Pro Cable to connect amp and interface. I'm guessing most guitar cables are unbalanced and of course mono, correct?

As far as y cables, I do have one of this which is stereo in, stereo out.

So what would I need for this to work? Right now I'm hearing three guitar cables (one for guitar to amp and two for the interface) and a y cable. Do they make these for combining mono signals, or will the one above work fine for this?

Please excuse my ignorance and thanks again.
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Re: Is It Safe To...?

Postby Jarno » Thu Jan 17, 2013 9:41 pm

Bane wrote:As far as y cables, I do have one of this which is stereo in, stereo out.

No, no! The Y-cable you need is STEREO -> 2xMONO.

But I wouldn't bother. Usually just running guitar cable from headphone output to audio interface works well. Yes, it shorts the right channel of you amp's headphone output, but I haven't yet met a headphone amp, which can't handle a short-circuit.

OTOH, why do you want to record signal from headphone out of your amp? Usually big part of the guitar sound is generated by the speaker. That's why we usually put a microhone in the front of the speaker.
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Re: Is It Safe To...?

Postby Split » Thu Jan 17, 2013 10:44 pm

Jarno wrote:
Bane wrote:But I wouldn't bother. Usually just running guitar cable from headphone output to audio interface works well. Yes, it shorts the right channel of you amp's headphone output, but I haven't yet met a headphone amp, which can't handle a short-circuit.


Ooo, the OCD in me hates doing things like that, you're right of course but... I still disapprove :lol:
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Re: Is It Safe To...?

Postby Bane » Fri Jan 18, 2013 2:09 am

Jarno wrote:OTOH, why do you want to record signal from headphone out of your amp?


I like to perform without starting up my DAW every time, in fact you don't even have to log on. Being that the amp is my guitarist friend's, I don't think he'll like that idea...
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