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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 2009-02-13, 03:51 AM
deivas77 deivas77 is offline
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LP4 mode?

Hi,
this is Dave Gahan 2003.11.24 Milan [MD4].I know, that was used Sony MD(no more info). And I saw, that other trader have this show at MD1 generation with comment:"It looks like MP3, but NOT for sure. I had the master from taper... It`s LP4 mode!!"
Anybody can help me? It`s lossless or mp3 sourced? Sorry, bad question- it`s really can be LP4 mode or mp3 sourced?
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File Type: gif DG 2003.11.24 Milan MD4- 2sec- b&w.gif
( 222.7 KB, 50 views)
 
File Type: gif DG 2003.11.24 Milan MD4- 2sec.gif
( 193.1 KB, 44 views)
 

Last edited by deivas77; 2009-02-13 at 04:09 PM.
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  #2  
Old 2009-02-13, 04:41 AM
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Re: LP4 mode?

that is definately lossy.

great job on the screenshots, that is exactly the view needed to analyze.

no way to be sure what compression codec was used, but it looks like MP3 to me. Bad mp3, like 128k or even 96k, maybe. The 14 kHz brickwall is abnormally low and it is very blocky. There's a lot of artificial sound in there.
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  #3  
Old 2009-02-13, 04:54 AM
deivas77 deivas77 is offline
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Re: LP4 mode?

jameskg,
thanks for answer, but in "Bad mp3, like 128k or even 96k" I see "lego". But here...maybe some noise reduction? I just don`t want to believe, that it`s mp3
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  #4  
Old 2009-02-13, 04:57 AM
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Re: LP4 mode?

no way.
That's lossy data compression. Probably digital NR, too and God knows what else.. that is ugly audio for something recorded in the current century.

I'm sorry to bear the bad news.
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  #5  
Old 2009-02-13, 05:11 AM
deivas77 deivas77 is offline
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Re: LP4 mode?

it`s funny, but TLH test for mpeg shows, that it`s cdda
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  #6  
Old 2009-02-13, 05:17 AM
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Re: LP4 mode?

The author of TLH is here at TTD... maybe he can have a look at why that result would be returned. Maybe it's just seeing 44.1k / 16b or something. Doesn't matter.. it's been molested, or recorded with a lossy recorder.
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  #7  
Old 2009-02-13, 05:42 AM
deivas77 deivas77 is offline
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Re: LP4 mode?

what you`re thinking about this? at 2sec shot I see "lego", but no cut in one line like mp3...(it`s other show)
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File Type: gif Tokyo110990.gif
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  #8  
Old 2009-02-13, 11:16 AM
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Re: LP4 mode?

LP4 minidisc recording is very lossy to allow so much time per disc. Not MP3, but no better really.
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  #9  
Old 2009-04-27, 11:35 AM
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Re: LP4 mode?

LP4 is 66kbps ATRAC3, according to wikipedia.
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Old 2009-05-01, 12:02 PM
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Re: LP4 mode?

TLH's 'detect mp3' function (audcdtect) is not reliable...

old thread I know but I'll pitch in both are very obviously lossy. appears to be lower-quality md setting on the 1st, 2nd is strange since it goes up to 22050Hz but blocky blocky blocky lossy!
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  #11  
Old 2009-05-06, 05:18 PM
deivas77 deivas77 is offline
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Re: LP4 mode?

Quote:
Originally Posted by Five View Post
TLH's 'detect mp3' function (audcdtect) is not reliable...

old thread I know but I'll pitch in both are very obviously lossy. appears to be lower-quality md setting on the 1st, 2nd is strange since it goes up to 22050Hz but blocky blocky blocky lossy!
about 2nd: maybe reason is for very high generation copy? source was tape...
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  #12  
Old 2009-05-06, 11:47 PM
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Re: LP4 mode?

Quote:
Originally Posted by deivas77 View Post
Quote:
Originally Posted by Five View Post
TLH's 'detect mp3' function (audcdtect) is not reliable...

old thread I know but I'll pitch in both are very obviously lossy. appears to be lower-quality md setting on the 1st, 2nd is strange since it goes up to 22050Hz but blocky blocky blocky lossy!
about 2nd: maybe reason is for very high generation copy? source was tape...

understand: it's been through very, very lossy digital compression. Three months' time passage doesn't bring back the lost audio data
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  #13  
Old 2009-05-12, 02:35 AM
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Re: LP4 mode?

yeah, lossy is in there for sure could have cassette as well who knows its a really weird one.
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