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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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  #16  
Old 2013-01-18, 12:35 PM
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Re: ATRAC or LPCM ?

Quote:
Originally Posted by jameskg View Post
Hello.


your screens shots are of little use.

you may omit the frequency analysis, which has very little to do with determining whether audio has been through lossy data compression.


please post 2-3 second spans, in color, from Cool Edit Pro 2.x / Adobe Audition, so we can actually see something.
Here you go in color as you wish.
http://i733.photobucket.com/albums/w...introwav-1.jpg
http://i733.photobucket.com/albums/w...ightswav-1.jpg
http://i733.photobucket.com/albums/w...llingwav-1.jpg
http://i733.photobucket.com/albums/w...Housewav-1.jpg
http://i733.photobucket.com/albums/w...urWaywav-1.jpg
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  #17  
Old 2013-01-18, 07:03 PM
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Re: ATRAC or LPCM ?

Could by lossy, there is a definite drop off after 17k ish? I think I see some blocks too.
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  #18  
Old 2013-01-18, 09:52 PM
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Re: ATRAC or LPCM ?

Sort of looks like a cutoff at almost 17khz, and MAYBE a little lego block-y. Honestly still a little hard to tell - screen resolution is still a little too low, and it's making the pixels a little blurry! A higher resolution screenshot would be a little better, IMHO...

I do see a bit of a 20k band especially on the right side, though.... Hmmm...

OK, here's a question, how were these files transferred to the computer? Digital transfer via USB, or did you play them in at real time via the analog line out to your analog line in on a soundcard or something?

Any more info than just a screenshot would help to identify what you're doing. The more we know, the more we can figure out...
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  #19  
Old 2013-01-19, 12:36 AM
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Re: ATRAC or LPCM ?

Frequency range / HF roll off are not indicative of lossy data compression.



All those samples look lossy. I have a question about one of them, but they're all compromised, I'm pretty sure. It's hard to be certain because of the low resolution of the screen caps

I'm sorry to keep asking for things, but please try to make your screenshots at least 300dpi, else it becomes difficult to read what's going on in the spectrum analyzer. Low res jpgs blur details pretty badly because... Get this. Lol... It's lossy compression
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  #20  
Old 2013-01-19, 07:30 AM
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Re: ATRAC or LPCM ?

Next time maybe post small sections in FLAC instead of having to give 1000 different screen shots lol
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