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Lossy or Lossless?
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  #1  
Old 2007-12-24, 01:01 PM
artatore artatore is offline
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EAC question

OK, I had been using EAC to check my audios for being possibly mp3 sourced...
The defenition is easy - if it has any black spots - it is mp3 sourced, right!?
If there ain't any - it is mp3 free, right!?
However, I came across a bootleg that has one very thin red and yellow line that goes along 16000 on the graph. What does this thin red and yellow line mean??
That is like the one bootleg I had seen have that in my entire collection...
What does it look like if it is DAT sourced?
DAT is not same as mp3, must look differently...
Anyone???
I am sure this is not only my question.
Thanx everyone.
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  #2  
Old 2007-12-24, 01:47 PM
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paddington paddington is offline
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Re: EAC question

ok...

EAC isn't real accurate for looking at spectrum analyzers spotting MP3... helpful, but not really good enough. Try Adobe Audtion.

the thin line is like just below 16kHz and generally means someone transferred the tape in the analog domain near a CRT (old computer monitor) that generates that noise - with an unsheilded cable or cheap soundcard. Means there is noise - nothing else.

You can't tell a DAT source from a spectrum analyzer display - unless it's 32kHz DAT - then you can only guess. Do not equate DAT with MP3 - DAT is uncompressed while MP3 uses lossy compression.
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  #3  
Old 2007-12-24, 02:17 PM
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Re: EAC question

check over here:
http://www.thetradersden.org/forums/...ead.php?t=4288

especially here (read to pg2!)http://www.thetradersden.org/forums/...ead.php?t=1331

if you could give us some pics or a 10-20second FLAC sample (or just a short track) on rapidshare/sendspace or similar and link it up here we can check it out a little closer.

also take a look at some of the old threads here for a goldmine of knowledge on lossy/lossless:
http://www.thetradersden.org/forums/...splay.php?f=47

happy holidays!
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Old 2007-12-24, 02:19 PM
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pawel pawel is offline
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Re: EAC question

Quote:
Originally Posted by jameskg View Post
the thin line is like just below 16kHz and generally means someone transferred the tape in the analog domain near a CRT (old computer monitor) that generates that noise - with an unsheilded cable or cheap soundcard. Means there is noise - nothing else.
Have you ever seen FM spectrum
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Old 2007-12-24, 02:47 PM
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Re: EAC question

FM carrier is more like 19kHz
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  #6  
Old 2007-12-25, 05:44 AM
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pawel pawel is offline
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Re: EAC question

Quote:
Originally Posted by Five View Post
FM carrier is more like 19kHz
yep but check recordings before 80s - the line if very often exactly at 16kHz
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  #7  
Old 2007-12-25, 10:09 AM
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AAR.oner AAR.oner is offline
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Re: EAC question

typically, a spike/stripe around 16kHz is indicative of a TV source somewhere in the lineage

as Five said, a 20 sec sample from the middle of one of the tracks would be helpful
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