Quick Question

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Member Since: May 02, 2007

First of all, excellent site, Ive found the articles to be very helpful. Ive got a question for you guys/gals... Ive got a boss dd-20 digital delay pedal which has 2 outputs and a "sound on sound" feature (can send the signal to 2 different amps and basically "jam" by myself) Anyway, when I let these 2 amps play "outloud" everything is fine. But if I send the line signal from each amp to my mixing board (so I can listen to them on my mixer headphones), it lets out an awful squeel like theres some sort of circuit issue or something. Anyone know why this would be?

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Kaos is only a form of insanity
Since: Feb 03, 2005

May 03, 2007 12:33 am

Are you plugging into Line in or XLR? are the gain / volume setings up to high on both the pedal and mixer?

Since: May 02, 2007

May 03, 2007 02:03 pm

Im doing line in (patch cord from each amp direct to the board)The gain is fine on each. If I unplug either one from the board, it acts fine and plays whichever connection is still plugged into the board, but as soon as both are plugged in at the same time it lets out the eir piercing squeel. I think it has to do with both signals going into the board coming from the same source (the pedal), like the signals need to be coming from separate sources for it to accept it.

Prince CZAR-ming
Since: Apr 08, 2004

May 03, 2007 02:11 pm

Sounds like it's a feedback loop you're hearing, having signal going out one side, and coming right back in the other side.

I just can't see how it's doing it.

You're going into 2 different channels, I'm thinking? I'm assuming you are.

Are you panning each channel left and right? That may fix your problem, though it may not.

Separating the two signals might keep them from feeding each other.

I dunno, I guess I'd have to see it, to know anything further.

Since: May 02, 2007

May 03, 2007 02:30 pm

Yeah it does seem like a feedback loop i guess. Yep, 2 separate line in channels on the board, one panned far left and the other far right (see how this could be a cool setup if I got it figured out?!)I mean I could just play the amps outloud but I live in a apt. with kinda thin walls thus I want to be able to listen to it through the board monitor headphones.

Since: May 02, 2007

May 03, 2007 03:04 pm

OK so if I bypass the amps and go direct from the pedal outputs to the board it works... weird. Im sure I'll figure it out from here... thanks!

Since: May 02, 2007

May 05, 2007 04:03 pm

update: it was a bad cable.

Ne'er ate 'er
Since: Apr 05, 2006

May 05, 2007 06:38 pm

Yep, that's the way it usually is. Start with the most complicated reason, then work your way down. I am very guilty as well.

It's handy to remember Occam's razor: en.wikipedia.org/wiki/Occam's_Razor

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