DAT LP or lossy?

[taygan]

Here's a show that I was told is DAT LP. I've looked at it and think that might be right, it looks good in audacity, but not so good in EAC.

Sonic Studios mics > D7
MDAT>CDR

notes: DAT was switched into LP mode, so the whole show is uninterrupted from a 60M master.

Audacity 2 sec frequency:

http://img212.imageshack.us/img212/9033/manuchao20010707frequency8io.th.png (http://img212.imageshack.us/my.php?image=manuchao20010707frequency8io.png)

Audactiy 2 sec spectrum:

http://img208.imageshack.us/img208/1253/manuchao20010707spectrum9we.th.png (http://img208.imageshack.us/my.php?image=manuchao20010707spectrum9we.png)

EAC 2 sec frequency:

http://img206.imageshack.us/img206/2086/manu0707eac2secfrequency3sv.th.png (http://img206.imageshack.us/my.php?image=manu0707eac2secfrequency3sv.png)

EAC 2 sec spectrum:

http://img215.imageshack.us/img215/9268/manu0707eac2secspectrum9ac.th.png (http://img215.imageshack.us/my.php?image=manu0707eac2secspectrum9ac.png)


Thanks,
taygan.

[Five]

can I get a yousendit.com sample from this show? 10-20 seconds would be great (or just a short track from the show).

[Malth]

I assume LP means it was recorded at 32kHz?

If so, it seems to look fine, not like some mp3's that have a very sudden cutoff at around 16kHz

[Five]

32kHz DAT cuts off at about 16kHz so looks about right. that crap you're seeing in the highs is because EAC is terrible at sa.

http://www.thetradersden.org/forums/showthread.php?t=4288

There is a little bit of noise up there, but I could only spot it when viewing in b&w. it does look a little blocky at the top and a little fuzzed (perhaps from analog transfer?). I can't spot any direct evidence that this is lossy.

would love to get some more opinions on this

[taygan]

Could the noise be from the unknown conversion from 32kbps sampling to 44.1(?) for the cd generation?

[Five]

I would guess it is from the transfer from the DAT deck to an analog input with a nearly noise-free soundcard

I'm really out on a limb saying this stuff, of course

the main thing to understand is that the noise you see displayed in EAC SA is not as it appears, it is a mirroring effect.

if you look at the more accurate CEP SA it is 98% noise-free

you can really get to the bottom of this if it is possible to track down the taper

[ssamadhi97]

would love to get some more opinions on this
Sure, if you hand over the sample... ;)

[Five]

yeah that might help

http://s6.yousendit.com/d.aspx?id=1QJRCDXFVNHAE19VVPRL1S8YVH

http://download.yousendit.com/D7ACD840270952FA

[ssamadhi97]

So, looks like it's from 32kHz DAT all right. You even see the faint mirroring/aliasing effect at 16kHz caused by the resampling filter.

Gotta go now, picture later if I don't forget.

[ssamadhi97]

Here.

Note hawt vertical flipping action around 16kHz.

Typical side effect of resampling. Dig old threads for more info.