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Lossy or Lossless? Please use this forum to post spectral and frequency analysis posts about shows you have your doubts about.

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  #1  
Old 2010-01-29, 10:59 AM
Moozar Moozar is offline
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Join Date: Apr 2005
i need some help on identifying lossless/lossy

I recently sifted through my bootleg collection and these 3 have me confused. I received them from someone I normally trust but they just look wrong to my amateur eyes:

Track 1:
spectrum: http://imgur.com/I9xMx.jpg
frequency: http://imgur.com/BrhMd.jpg
song snippet [wav format]: http://www.sendspace.com/file/gf5e51

Track 2:
spectrum: http://imgur.com/be4rM.jpg
frequency: http://imgur.com/SJ0fG.jpg
snippet: http://www.sendspace.com/file/ga26dl

Track 3:
spectrum: http://imgur.com/RAbkU.jpg
frequency: http://imgur.com/eJQ8L.jpg
snippet: http://www.sendspace.com/file/96cqwk

Unfortunately I can't find any info on equipment used for taping, who transferred this how etc.
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  #2  
Old 2010-01-29, 11:16 AM
lintoni
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Re: i need some help on identifying lossless/lossy

You'll need to re-do the spectrums

First, adjust the spectral readings in Audacity so that it covers the full CD range.

Edit>Preferences>Spectrograms

Set Maximum Frequency (Hz): to 24000 (this will also be suitable for 48k files such as typically found on DVDs, etc.

Then redo your screenshots on a 2-3second portion of the track and re-post.
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  #3  
Old 2010-01-29, 11:46 AM
Moozar Moozar is offline
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Join Date: Apr 2005
Re: i need some help on identifying lossless/lossy

Quote:
Originally Posted by lintoni View Post
You'll need to re-do the spectrums

First, adjust the spectral readings in Audacity so that it covers the full CD range.

Edit>Preferences>Spectrograms

Set Maximum Frequency (Hz): to 24000 (this will also be suitable for 48k files such as typically found on DVDs, etc.

Then redo your screenshots on a 2-3second portion of the track and re-post.
Thanks a lot for that hint, hope I didn't upset anyone with such noob images.
If these aren't useful either let me know:
Track 1: http://imgur.com/Kl18K.jpg
http://imgur.com/p37Ni.jpg

Track 2:
http://imgur.com/EPm3t.jpg
http://imgur.com/t8rPB.jpg

Track 3:
http://imgur.com/dTov8.jpg
http://imgur.com/bBPTL.jpg
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  #4  
Old 2010-01-30, 05:26 AM
lintoni
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Re: i need some help on identifying lossless/lossy

I'm pretty sure 1 and 3 are mp3. I think that 2 might be from minidisc.

See http://www.thetradersden.org/forums/...ead.php?t=8003
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  #5  
Old 2010-01-30, 10:13 AM
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rspencer rspencer is offline
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Re: i need some help on identifying lossless/lossy

I agree.
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  #6  
Old 2010-01-30, 05:47 PM
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AAR.oner AAR.oner is offline
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Re: i need some help on identifying lossless/lossy

i'll third that
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  #7  
Old 2010-01-31, 02:48 AM
Moozar Moozar is offline
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Join Date: Apr 2005
Re: i need some help on identifying lossless/lossy

Thanks for the help folks.
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