I asked Jonathan,

T> (2) if we want to fool a Sony MD recorder into matching the correct samples
T>     for monaural recording, should we lop off one sample from the leading
T>     silence in the left channel or one sample from the leading silence in
T>     the right channel?

He responded,

I> The right channel - then the MD will receive the first left-channel sample
I> with the second right-channel sample, and for monauralizing, "the sample
I> used from the left channel is one sample earlier than the corresponding
I> sample from the right channel", ...

According to what you said before and what you said below, the sample used
from the left channel is one *later* than the one used for the right channel.

I> ... meaning that it then puts its second left-channel sample with its
I> first right-channel sample, restoring the original signal.

OK, I'm confused.  I thought originally that you said that the Sony machines
were combining the right channel of sample N-1 with the left channel of sample
N.  So lopping off one sample of leading silence from the right channel would
move sample N(R) to position N-1(R), where the MD recorder would pair it with
sample N(L).

But when I tried it with a mono track that peaked at 100%, lopping off a
sample from the start of the right channel cut the peak to 98.5%, while doing
it from the left channel instead cut it to 99.1%.  The only thing that got
proper results was the R3's method of dropping the right channel.

Unfortunately I'm having no luck with the files you uploaded; they don't seem
to come out right for me.

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