So I've been fighting with nasty audio distortion on the audio out on a
Mac mini and finally solved it, but I don't understand it. Last March I
got a Mini which I use for AV purposes connected to a Mackie 16 channel
mixer, amps etc. The audio out from Keynote, iTunes and such was
horribly distorted. If I used headphones it was fine. The built-in
speaker was also fine. As it turns out the house sound system is mono
so, like I usually do, I have a "Y" cable that connects the left and
right together before plugging it into the mixer. On a whim I had pulled
one of the cables off the Y and the audio problem went away. In other
words, if I just have left or just right it works fine, but the old Y
cable trick made it all distorted. What was weirder was if I ran the
mini's left and right into separate channels on the mixer it was also
fine. All I can figure out was that the output signals combined were too
hot for the mixer to handle (doubtful) or there is some digital
weirdness that the two signals together cancel or combine in a horrible
way. The same files through the same Y cable from my wife's MacBook
worked just fine. Soo, not sure I have a question other than theories as
to why this happens and if you run into the same kind of trouble, don't
Y the left and right audio outputs from a Mini together.
CB
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