[Gary Eickmeier]

Tom McCreadie wrote:
OK I am done for the time being, and I got sound out of the speakers
now, but still have a problem at the headphones. The main culprit
was a Y cord out of the sound card that was used to split the signal
to two different speaker/amp aystems. I didn't think that would be a
problem when I did it, but apparently the Y cord is causing some
grounding or phase reversal error, so I de-commissioned one set of
speakers and now I have speaker sound but not headphone output.

Still some questions: Exactly what kind of "Y cord" were you using to
come out of your computer sound card?

Was it a 'splitter'. where its (1/4"or 1/8") trs phone plug splits
out the signal into unbalanced Left channel (from tip & sleeve) and
Right channel (from ring & sleeve), these unbalanced signals getting
passed along via rca, or 1/4"mono (ts) plugs or 1/8" mono (ts)
miniplugs?

Or was it actually a 'duplicator', where the stereol trs signal is
converted into _two_ stereol trs signals, probably with contraplug
termination? What's the input connector type on the Logitec
amp/speaker?

And was this the same Y cord used at the recording location? . That
may have been inappropriate for the soundboard, which could have been
outputting a balanced mono vocal signal (tip +ve, ring -ve, sleeve
ground).

Two different Y adapters. The one on site is a mono phone jack leading to
two RCA females. I then connected another Y adapter, two male RCA ends
leading down to a stereo mini 3.5mm phone plug. On the computer it is just a
3.5mm out of the sound card - whoops - I just had a flash - I don't have
just a stereo sound card, it is a 5.1 card, with six connections to the
amplifier. Well, actually they have 3 stereo pairs going to the amp and
thence to the speakers. However, I also have a Matrox processor looped in
there somehow, so I need to check out my whole audio wiring setup. Hard to
see down in there. I will keep trying!

Gary