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check for lossy in lineage

Started by sls.stormyrider, January 25, 2008, 07:26:18 PM

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sls.stormyrider

I received some CD-R in trade. Is there any way to tell if these ever were lossy files? I read that you could do it with TLH but other than audio file details, which looks for SBEs, I can't figure out a way to do it.
Thanks for any suggestions.
"toss away stuff you don't need in the end
but keep what's important, and know who's your friend"
"It's a 106 miles to Chicago. We got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses."

jephrey

I would only know how to compare it with the non-lossy.  I don't know if there are any trademarks that can be seen in the sound wave but I'm sure you could look for anything over /under a certain frequency because I think one of the things lossy compressions do is eliminate sounds closer to the threshold of human hearing, but I could be wrong here.  I'm just taking an educated guess.
There are 10 types of people in this world.  Those who understand binary, and those who don't.

kellerb

I've used a program called Tau Analyzer to check. You pop the cd in, run the program, and it scans the tracks for signs of Lossiness--mainly the frequency cutoffs, I think.  I'm not sure that its fool-proof, but it seems to work

http://www.true-audio.com/

sls.stormyrider

"toss away stuff you don't need in the end
but keep what's important, and know who's your friend"
"It's a 106 miles to Chicago. We got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses."

jephrey

There are 10 types of people in this world.  Those who understand binary, and those who don't.