Eiron wrote:

On a second look at the results, the signal through the crappy cable was
down by 0.1% or 0.01dB.

So there is a difference then.

and the voice barely distinguishable.
^^^^^^^^^^^^^^^^^^^^^^
"barely", meaning "there was a difference, but only a very tiny one".

Which still shows that a crappy 1 metre interconnect makes no audible
difference.

You just contradicted yourself there. Either there was a difference or
there wasn't. You've said there was. There was a 0.01dB loss in the
crappy cable - that's still a loss.

The human ear is far more sensitive than most test equipment. If you can
measure it, you can certainly hear it.

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