Alesis iO2 + electric acoustic guitar

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punkasspriest

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Okay I'm pretty new to home recording but thought I'd get myself an Alesis iO2 audio interface.

So i've just installed all the drivers and got everything installed. The strange thing is, plugging my electric acoustic guitar through the 1/4 inch jack input means that the battery light won't turn on on my guitar to show that it is active. The weird thing is the battery light comes on if i have the jack plugged in sort of half way and will flcik on and off as i switch between +48v powered and unpowered. However the device still doesn't pick up any audio

The even stranger thing is, to check that my guitar works, if i plug the jack from the guitar into any of the outputs or even the phones socket my guitar battery light lights up.

My battery is brand new and everything with the guitar is in working order but when i plug into the guitar/Line input socket I get absolutely no power from the guitar.

I don't quite understand!

Any help would be much appreciated.
 
Any chance you're using a TRS cable instead of TS, or vice versa?

I know some electro acoustics take advantage of the fact that guitars use TS cables.
They have a TRS jack and use the fact that ring and sleeve will be be bridged when plugged in to turn on the guitar preamp.
 
Im using TRS (as far as i'm aware, it has two black rings closer to the tip) and as i say the preamp turns on if i plug into the other sockets just not the inputs.
 
Use TS.

The guitar is designed to turn on when the extended sleeve of the cable jack bridges the guitar socket's ring and sleeve.
I hope that makes sense; I'm bad at explaining things.

I replaced a broken socket for a guy a while back. I didn't know any better and just used a TS socket.
Then realised that his guitar was permanently on. :facepalm:
 
No that makes perfect sense what you're saying, i just cant understand how it can be the cable jack when plugging into a different jack socket can cause the preamp to turn on. Doesn't that indicate that the cable isn't to blame?
 
Also I've never had any issues before when using amplifiers.

Edit: I'll try and pick up a TS cable next week see how it sounds. I borrowed this cable from work and didn't check the rings on it
 
Tell us what happens when you get to use the TS cable.
 
punkasspriest said:
No that makes perfect sense what you're saying, i just cant understand how it can be the cable jack when plugging into a different jack socket can cause the preamp to turn on. Doesn't that indicate that the cable isn't to blame?
Click to expand...

It depends what's happening at the interface/amp end. If the input socket is a TRS with R+S bridged, then you'll have no problem.
I'd expect you'd have problems with a balanced input as R+S aren't bridged.

Also, if you look at the alesis, it's a guitar/line input, so there's a good chance it's a balanced input.

IDK. Definitely worth checking at least.

Tell you what; Plug the cable into your guitar and take the other end in your hand.
Use a bit of foil or wire or anything, even a fork, to bridge ring and sleeve.
I bet the guitar preamp lights up.
 
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