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Running into issues with ABY box re-joined with 2-female-to-1-male jack
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Old 21st July 2012   #1
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Running into issues with ABY box re-joined with 2-female-to-1-male jack

Hi all, first post here but I swear I did my due diligence in the searchbar and couldn't find anything. I'm running into issues splitting my guitar signal on my pedalboard and then running it back into one line. Not sure if this is just a basic no-no but it seemed like a great idea and now I have all this gear that I can't get to create the sound I envisioned.

I'm using a Livewire ABY box that works in most other positions with no problems. My signal comes in through the in, then I split into A to control my delays and B to have dry signal. I'm going for a Gilmour-kinda sound if possible, with both the delays and dry signal hitting the reverb. Then I join both signals up with a 1/4" splitter, 2 female ends to one male. Like this.

Here's my setup:

guitar
compressor
big muff pi
Korg multifx
EQ (everything up to this point works fine)

then that runs into a Livewire ABY box
A -> volume pedal
VP -> EHX Stereo Memory Man delay
SMMH -> Holy Stain reverb (using splitter)

The B channel just goes straight from the ABY into the other half of the splitter leading to the Holy Grail.

Sorry if that was a bad explanation but here's the issue: When I play either channel separately it sounds fine, but that's not why I got the ABY. I was hoping to play them A+B, then control the delays with my Vol Pedal. But it's an awful feedback-y ringing noise that is insanely loud even when my guitar is turned all the way down. It happens on any setting, with the knobs at any position on my delay pedal. I've heard the phase "out of phase" before and I'm wondering if this is at all what's going on here? Or is there any way to fix it? Could something totally unrelated be the issue?

Please tell me someone knows because in my mind this sound was really going to kick ass. I've been sitting on my floor tangling up my pedalboard for a couple hours now and I have no progress to show except an angry girlfriend due to the shrieking of my amp.

In case it matters: I'm playing a Fender American Fat Strat into a Fender Hot Rod Deluxe 40W tube amp. Also trying with my acoustic and same results.
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Old 21st July 2012   #2
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First issue off the bat -- you're using the wrong cable for splitting - you have a stereo to mono adapter, and you want a mono to mono splitter. If you want to stick with Hosa, you want the YPP-111 Mono 1/4" male to 2 1/4" females as shown here:

Professional Recording Equipment Accessories: Shop Our Selection of Audio Equipment Accessories, Custom Engraved Panels and Custom Audio Cables - HOSA YPP-111

Using a Y isn't the best idea - read here:
Why Not Wye?

Simple enough to build.

Your other issue is you have a cheap, poorly made ABY Box. Read the reviews - this is not a good ABY splitter. You should have transformer ISO, phase and ground lift to deal with various issues.

You may be better off with a true bypass loop pedal that lets you put your effects on a loop; some now have a variable mix control so you can mix that into the signal. That way, no splitting and merging - it's like an effects aux send, but for guitar signals.

WetBox
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Old 23rd July 2012   #3
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Quote:
Originally Posted by nedorama View Post
First issue off the bat -- you're using the wrong cable for splitting - you have a stereo to mono adapter, and you want a mono to mono splitter. If you want to stick with Hosa, you want the YPP-111 Mono 1/4" male to 2 1/4" females as shown here:

Professional Recording Equipment Accessories: Shop Our Selection of Audio Equipment Accessories, Custom Engraved Panels and Custom Audio Cables - HOSA YPP-111

Using a Y isn't the best idea - read here:
Why Not Wye?

Simple enough to build.

Your other issue is you have a cheap, poorly made ABY Box. Read the reviews - this is not a good ABY splitter. You should have transformer ISO, phase and ground lift to deal with various issues.

You may be better off with a true bypass loop pedal that lets you put your effects on a loop; some now have a variable mix control so you can mix that into the signal. That way, no splitting and merging - it's like an effects aux send, but for guitar signals.

WetBox
Thanks for your help! I looked at my Amazon history and I actually linked to the wrong splitter--I have the mono to mono one you mentioned. And I have another Morley ABY box coming to me, are those any better? I got both for next to nothing so I could play around with this setup so I want to play around with this but don't want to ruin any gear. :(

Felt pretty confident I could tackle this after reading the first few paragraphs of that article. Then there was a giant whooshing sound around here:
Quote:
One of the most common examples of tying two outputs together is in "monoing" the low end of multiway active crossover systems.
I'm interested in learning more about the tech side of my gear but I'm in over my head if I'd want to build one of those... Any commercially available summing boxes you know of for 2 or 3 inputs into one output? The only ones I'm seeing in my searches are all giant $1,500 summing units...

Would something like this DOD 240 work?

http://www.google.com/products/catal...ed=0CFcQ8wIwAA

Thanks again!
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