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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
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Need help analysing files!
Hi all,
I got four shows from an unreliable source, and after analysis, I'm not sure about the material, the EAC outputs seems weird to me. It may be obvious for some, but as I'm new into this stuff, I'd like to have your confirmation: I didn't want to spread lossy material... (All recorded with a Sony DAT TCD-D3 & self-made micros) Thanks! Show 1: Frequency Analysis Spectral View Show 2: Frequency Analysis Spectral View Show 3: Frequency Analysis Spectral View Show 4: Frequency Analysis Spectral View No members have liked this post.
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#2
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Re: Need help analysing files!
1st one to me appears lossless the other 3 lossy
__________________
"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#3
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Re: Need help analysing files!
That's a bad news, but thanks for the confirmation!
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ISO: Black Diamond Heavies, Bob Log III, Scott H. Biram, Jesse Sykes & The Sweet Hereafter, Joe Buck Yourself... > http://db.etree.org/duckandcover No members have liked this post.
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#4
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Re: Need help analysing files!
I would definately wait till a mod from here confirms. I'm new at this also. You can try zooming in on a 2 second frame in CEP and go into settings and change the colors. High energy to white, low energy to black and changing the gamma to 0.9. That will literally give you a clear black and white pic and be easier to decipher. If it is solid black above 16000 than you know its lossy.
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"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#5
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Re: Need help analysing files!
Quote:
__________________
"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#6
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Re: Need help analysing files!
Solid white you mean?
Thanks for the info man, I didn't know this CEP tool! (I guess I have to read the sticky threads...) Ok, this is another confirmation: show 1 looks fine (see cap) but others three are badly haircuted (2,3,4)! It's not "plain" white, but I guess it's enough to make those lossy! Thanks again!
__________________
ISO: Black Diamond Heavies, Bob Log III, Scott H. Biram, Jesse Sykes & The Sweet Hereafter, Joe Buck Yourself... > http://db.etree.org/duckandcover No members have liked this post.
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#7
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Re: Need help analysing files!
Quote:
__________________
"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#8
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Re: Need help analysing files!
I just looked at the 3 new samples. If you scroll with the mouse on your files you can zoom in on a 2 second section compared to having a SA of the whole file, by just keep on scrolling and watching the time stamps in the bottom right hand corner window. Once your zoomed in to 2 seconds the spectral analysis at the cutoff will be obvious. If you see a bunch of squares, than its lossy.
__________________
"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#9
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Re: Need help analysing files!
This is what I mean by squares on the cutoff at 16000. This is a file I converted to MP3 to see. Here it is.
__________________
"Schoeps Schmoeps!!! (I don't hate Schoeps mics, just the snobs who foolishly believe excellent recordings can't be made without them.)" Falconidave Mics: CA-14 (o,c,o) Remote Power: CA-9100 pre-amp, CA-UBB battery box Recorders: Sony PCM-M10, Tascam DR-2d Cable/s: custom 6" GAKables Mini Starquad Batteries: Maha 9.6V Imedion, Maha Powerex 2700 mAh Chargers: Maha MH-C9000, MAHA MH-C490F No members have liked this post.
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#10
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Re: Need help analysing files!
EAC is a crude tool for spectral analysis, that having been said I agree with the doctor 2-4 look bad. post a sample of the first show to megaupload or something if you can't figure audacity/cep correct settings so we can get a hold of it and have a look/listen.
ps check this link http://www.thetradersden.org/forums/...ead.php?t=4288
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Checksums Demystified | ask for help in Technobabble thetradersden.org | ttd recommended free software/freeware webring shntool tlh eac foobar2000 spek audacity cdwave vlc Quote:
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#11
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Re: Need help analysing files!
Many thanks for this thread, it saved me posting my own.
I have a wav show that I now know is converted from mp3. Everything above 16000 comes up white on CEP. As a comparison I ran a proper wav file and this was black from 0 and gradually fading all the way up to a dark grey at 20000 No members have liked this post.
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#12
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Re: Need help analysing files!
Quote:
The cut-off for a lossy source made from eMPty3 will stand out like dogs...... As you saw from the wav you checked lossless will also stand out. The problem in the future will be to tell what everything inbetween is, either sourced from or, (which is almost impossible) what possible device did the recording.
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" Your tin cup and string "recorder" is worse than a Zoom, which is saying a lot". No members have liked this post.
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#13
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Re: Need help analysing files!
Quote:
1. Taken from a wav file 2. Taken from an mp3 3. Taken from a BBC podcast recorded as a wav file in cooledit 4. Unknown source No members have liked this post.
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#14
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Re: Need help analysing files!
1 is fine. 2 is crap; delete it. 3 is fine due to the source. 4 is probably sourced from MD with some work done to it - even with the cut-off at 14000. Some would call "this" particular spectral lossy, others lossless. I'd keep it.
"All views noted above are personal. Others may/will differ".
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" Your tin cup and string "recorder" is worse than a Zoom, which is saying a lot". No members have liked this post.
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