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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 2006-08-17, 02:57 AM
Robert Cook
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New 2 lossy detection, opinions sought.

SSIA, I guess.
These are from an (outdoors) audience recording made in 2000.
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File Type: jpg freq1.JPG
( 114.3 KB, 38 views)
 
File Type: jpg spec1.JPG
( 185.5 KB, 31 views)
 
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  #2  
Old 2006-08-17, 08:40 AM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Since posting this I've made some more screenshots of the same show using Cool Edit Pro.
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File Type: jpg sa1.JPG
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  #3  
Old 2006-08-17, 12:39 PM
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Re: New 2 lossy detection, opinions sought.

looks like md to me

would it be possible for you to post a b&w sa zoomed to about 2 seconds in cep?

Quote:
Originally Posted by range_hood
Cool Edit pro 2.00
options > settings >

"colors" tab > "spectral" tab
Spectral High energy: black (highlight > change color)
Spectral Low Energy: white

Gamma: 0.4
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  #4  
Old 2006-08-17, 03:31 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Thanks 5, btw is it best to always use these b&w settings for sa?
This is the lineage I have, so far:
Audience recording > ? > Trade CDR > EAC (Secure) > WAV
If it is MD would the correct lineage be:
Audience recording > MD > ? > Trade CDR > EAC (Secure) > WAV
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  #5  
Old 2006-08-17, 04:15 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Rather than start a second thread, I hope it's alright to post another similar screenshot from the same artist (Dylan) from a show the previous day. Both not MP3, I think.
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  #6  
Old 2006-08-17, 04:43 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Sorry, I'm making a mess of this. Luckily the screenshots show the date of the shows. Here is the b & w that corresponds to the first set of images I posted.
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  #7  
Old 2006-08-17, 09:57 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Sorry again. I just figured out my mistake w/ the CEP settings. I can post the images again but I think these might be good enough.

While I've got the floor, which is the best file type for these screenshots? I read in one of the other threads that PNG is best.
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  #8  
Old 2006-08-17, 11:23 PM
rhinowing rhinowing is offline
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Re: New 2 lossy detection, opinions sought.

doesnt really matter, I usually use .gif
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  #9  
Old 2006-08-18, 05:57 PM
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Re: New 2 lossy detection, opinions sought.

everything you've posted there is md-sourced. it is most probably (98%) recorded direct to md by the audience taper. everything you've posted there shows MD "lego parapet" artifacts... which indicates ATRAC DSP Type-R SP or a close cousin.
http://www.thetradersden.org/forums/...ead.php?t=8003
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  #10  
Old 2006-08-18, 06:02 PM
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Re: New 2 lossy detection, opinions sought.

as for lineage I would put:

Audience MD recording > MD(m) > ?unknown transfer > CDR(x) > EAC (Secure) > WAV > FLAC

if its flac

I would also mention that the MD source was spotted using SA and that it is most likely taped to MD by the original taper, altho that knowledge is an educated guess as you didn't recieve lineage with it.
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  #11  
Old 2006-08-18, 06:14 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Thank you very much for your help. Hopefully I will be able to make it on my own from here on. I've already spotted several MP3s in my collection. I had no idea they were so insidious. Of course if I spot any curly ones I'll let you know.
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  #12  
Old 2006-08-18, 10:05 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

Quote:
Originally Posted by Robert Cook
Thank you very much for your help. Hopefully I will be able to make it on my own from here on. I've already spotted several MP3s in my collection. I had no idea they were so insidious. Of course if I spot any curly ones I'll let you know.
Didn't take me long to get confused again. Can I try a couple more examples, please?
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File Type: jpg hbsa.JPG
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  #13  
Old 2006-08-18, 10:14 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

It is best to always use the b&w settings for sa, right?
Is hbfa and hbsa another MD?
And what is the black line at 16000Hz in 1990sa? Sorry, the vertical scale is cut from the image but I think you'll get the idea.
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File Type: jpg 1990sa.JPG
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  #14  
Old 2006-08-19, 07:25 PM
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Re: New 2 lossy detection, opinions sought.

first two look md

second two look like fm lossless

b&w is best for showing the closer details
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  #15  
Old 2006-08-19, 07:34 PM
Robert Cook
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Re: New 2 lossy detection, opinions sought.

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