Jonathan peeked in,
I> My apologies for the slow reply. Also I will be away for the next 5 days,
I> but I will try to respond to any messages when I get back.
Having a life needs no apology. (I've a life, but it includes a lot of time
on the net.)
I> So, removing the first sample of the right channel before feeding into the
I> MD will restore the original when it is monauralized.
That's what I thought, but it gave poorer results than removing one sample
from the left channel's leading silence. Maybe the W1 does the reverse of
what the 520 does?
I'd written,
T> But when I tried it with a mono track that peaked at 100%, lopping off a
T> sample from the start of the right channel cut the peak to 98.5%, while
T> doing it from the left channel instead cut it to 99.1%. The only thing
T> that got proper results was the R3's method of dropping the right channel.
Jonathan responded,
I> What did a straight mono recording with no phase shifting give (or is
I> that what you are measuring things relative to)?
99.9% on the W1, 99.8% on the F70. I'm measuring relative to maximum ampli-
tude representable when the mono MD track is copied to audio CDRW and ripped
back to .wav; my soundcard has no digital ports, so I cannot go digitally
from MD straight to hard disk.
T> Unfortunately I'm having no luck with the files you uploaded; they don't
T> seem to come out right for me.
I> What happens to the files? For the mono one, does the level meter stay on
I> full throughout or does the reading start to decrease steadily after about
I> the first 5/6 seconds of the recording of the file?
I've no way to feed them to the level meters short of burning them to CDRW,
which I guess I could try, but at the time I wrote I wasn't sure how to
interpret "left-shift" and "right-shift"; now I realize I could just look
at the .wavs in an editor and see for myself.
I> Also, when you say that the mono track peaked at 100%, do you mean the
I> actual original, or when it has been recorded in stereo to the MD
I> (comparing with the level after stereo recording to the MD would eliminate
I> the effects of the ATRAC, which could possibly account for or at least
I> affect the results).
Both the mono .wav from which I started and the one made by burning it to
CDRW, recording from CDRW to MD, recording from MD to CDRW, and ripping back
to hard disk peaked at 100%.
I> If the MD did have the problem, there would be a 'worse' direction and a
I> 'perfect' direction when phase shifting and a straight not-shifted
I> recording would be somewhere in the middle.
That's what I'd expect as well.
Right now I have a choice to make when the situation arises: record to the R3
and use an older ATRAC algorithm (Sony 3.0), or record in stereo and not save
the disc space. Lopping off one sample gives unpredictable results.
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