Wild Squealing Noises???

[bobandshawn]

Hey everyone,
I've posted this question on other forums to no avail. Maybe you guys can show them up! I'm recording using Native Instruments Guitar Rig 2 on a new Dell with plently of RAM, processing power, etc. I'm using ASIO4all for my ASIO driver. Everything works great when I use my headphones or go "out' to my computer speakers. However, when I try to use the same output and plug into my Fender or Marshall amps to play live - I get this wild squealing like it's in a feedback loop.

Setup: Telecaster via phono plug into a Yamaha mixer. Mixer to the computer line in. Computer speaker out to a Radio Shack "A-B-C' analog audio switch. "A" goes to external powered surround sound speakers. "B" button goes to headphones. "C" button goes to an RCA to phono adapter plug for the amps. The configuration of A-B-C doesn't matter - I've changed them around already. Whenever I try to plug into the amp I can tweak the settings real low and delicately, but as soon as I hit a note or chord a little too hard it starts screaming at me and I have to pull the plug. Any thoughts or ideas? Balanced/unbalanced, line level mic level, grounding, shielding?

Thanks in advance,
Bob

It's feedback...

When monitoring what you're recording, use headphones.

[bobandshawn]

Thanks Danny, but where is the loop coming from? There are no mics or speakers or anything else (that I know of) for the feedback to generate through. I know it sounds like feedback - but how to I stop the loop so I can play through an amp?

[ssscientist]

Sounds to me like you're feeding the guitar amps WAY more level than they're expecting.

If you have an output level on your interface or soundcard turn it down as far --- or almost as far --- as it will go, then depend on the amp to boost the level.

Guitar Rig is nothing more than a fancy Pod or J-Station, but with line-level power behind it.


.

[fraserhutch]

Or you're accidentally recording the upstairs neighbors having sex.

Originally Posted by bobandshawn

Thanks Danny, but where is the loop coming from? There are no mics or speakers or anything else (that I know of) for the feedback to generate through. I know it sounds like feedback - but how to I stop the loop so I can play through an amp?

Hm, no mics? Sorry, guess I misunderstood.

Is your setup like this?

Guitar -> Computer -> Guitar Rig 2 -> Line outputs -> Amp??

I don't think amps accept a line-level signal. I'm not an expert on this stuff though.

[axeman_ukl]

it sounds like you are feeding the amps with an amplifed signal , the output on the soundcard is alot louder than a guitar would produce , do you have an input where you can plug in an external audio source on the amp ?

does it do it if you go to the surround sound speakers instead of the amp ?

[bobandshawn]

AXEMAN,
That's what I don't get. It works fine with the powered surround sound speakers. Last night I tried a Direct Box and dropped the signal to the amp by -40db into the effects channel of my amp. Worked a little, but when you strum just a little too hard that one time - it screams like a banshee and pegs all the meters in Guitar Rig until I unplug it!

P.S. I've also tried doing the same thing with my little Marshall that has a dedicated "CD/Mp3" in channel (powered signal?) and it does the same.