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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 2004-12-09, 02:57 AM
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Re: Is this mp3?

Yeah, my fa looks totally different... I just double-checked to make sure that I got the right file. Maybe desert_rat mailed me the wrong clip??
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  #17  
Old 2004-12-09, 03:09 AM
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Re: Is this mp3?

Sent you the right clip. When I extract an entire song, and use EAC "process wav" I get the the same thing I posted originally. When I do a 2 second sample, which I sent to Five, it's the same sa and fa in EAC. However, when I bring the sample into Adobe Audition it matches what Five sees.

So apparently I just need to use a different program....

Either way, looks like I need to cull this from the collection. Thanks for the help and sorry for the confusion
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Last edited by desert_rat; 2004-12-09 at 03:19 AM.
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  #18  
Old 2004-12-09, 03:38 AM
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Re: Is this mp3?

Just out of curiosity do either of you want to try Anal Frequency to see how it looks in a third program? It's not very comforting to have two programs show such different results.
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  #19  
Old 2004-12-09, 03:45 AM
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Re: Is this mp3?

this is a revelation. it seems that EAC doesn't do a very good job at fa! where do I get analfreq these days? somebody got a link? I think they changed the name of the prog recently...
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  #20  
Old 2004-12-09, 03:51 AM
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Re: Is this mp3?

oh, here it is: "SpectraScope" I'm surprised he didn't call it AnalScope lol Costs $30 these days

http://www.sharewaretools.com/audio/1145/
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  #21  
Old 2004-12-09, 04:13 AM
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Re: Is this mp3?

Okay, I finally tracked down a copy of AnalFreq v1.80 still available on some ftp server in Sweeden:

http://ftp.sunet.se/pub/simtelnet/wi...nd/afreq18.zip

and a nice little guide is available here:
http://dislocateu2trade.webcindario.com/Analfreq.html

The results look more like the window in CEP:
Attached Images
File Type: gif analfreq_L.gif
( 16.5 KB, 138 views)
 
File Type: gif analfreq_R.gif
( 16.3 KB, 114 views)
 
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  #22  
Old 2004-12-09, 05:19 AM
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Re: Is this mp3?

Quote:
Originally Posted by Five
this is a revelation. it seems that EAC doesn't do a very good job at fa! where do I get analfreq these days? somebody got a link? I think they changed the name of the prog recently...
I've always thought the fa in Audacity is far superior to EAC's but not its sa.
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  #23  
Old 2004-12-09, 05:30 AM
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Re: Is this mp3?

Five, did you also check those in EAC? Just to be certain there was no mix up?
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  #24  
Old 2004-12-09, 05:53 AM
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Re: Is this mp3?

Quote:
Originally Posted by feralicious
Five, did you also check those in EAC? Just to be certain there was no mix up?
Here's screenshots of the analysis using EAC... keep in mind I've got a 2-second sample, so the sa is "zoomed in" compared to desert_rat's sa. I also attached two screenshots of the fa, 1st one at 512 fft size, and the 2nd at 65536 fft size (maximum). You can see the dropoff a lot better with the fft size at maximum!
Attached Images
File Type: gif eac_sa.gif
( 316.9 KB, 119 views)
 
File Type: gif eac_512fft.gif
( 16.0 KB, 112 views)
 
File Type: gif eac_65536fft.gif
( 17.3 KB, 108 views)
 
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  #25  
Old 2004-12-09, 07:38 AM
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Re: Is this mp3?

Holy shit Five....are those plots taken with EAC at the top of the page the same audio as the ones taken with analfreq at the bottom? The analfreq one is telling me, without a doubt, that this is mp3. The EAC one looks totally different.

I am stunned right now. I'll make sure to recommend people never use EAC for frequnecy analysis ever again if these two plots came from the same audio file! I always use and recommend analfreq anyway, but it looks like people will need to hold onto their old freeware versions.
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  #26  
Old 2004-12-09, 07:59 AM
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Re: Is this mp3?

Quote:
Originally Posted by RainDawg
This is absolutely NOT mp3 by any means. Might not be FM, cass has similar fading of the upper end. I think that what I'm looking is perfectly normal for a Cass(x) > CDR, with no foul play suspected on my part.


NOISE REDUCTION AND DOLBY B/C CAN ALSO LOOK LIKE MP3

(ESPECIALLY MULTIPLE GENERATION OF DOLBY)

ALSO A LOT OF OLD CASSETTE DECKS AND REEL TO REELS FROM THE LATE

60'S AND EARLY 70'S ONLY RECORDED FROM 20 HZ -12.5 KHZ !

I STILL THINK IT IS BEST TO USE THE EARS !

JUST MY 2 CENTS



AND JUST WANTED TO SAY THAT I LIKE THE LAYOUT OF THIS SITE

AND I HOPE ALL GOES WELL FOR YOU GUYS AND I REALIZE THAT YOUR

ONLY IN IT FOR THE MUSIC !



DID I MENTION I WASHED MY HANDS BEFORE TRANSFERRING THE TAPE ?
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  #27  
Old 2004-12-09, 08:01 AM
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Re: Is this mp3?

Quote:
Originally Posted by RainDawg
Holy shit Five....are those plots taken with EAC at the top of the page the same audio as the ones taken with analfreq at the bottom? The analfreq one is telling me, without a doubt, that this is mp3. The EAC one looks totally different.

I am stunned right now. I'll make sure to recommend people never use EAC for frequnecy analysis ever again if these two plots came from the same audio file! I always use and recommend analfreq anyway, but it looks like people will need to hold onto their old freeware versions.


IVE NOTICED THIS BEFORE ABOUT EAC

I USE SOUNDFORGE FOR FREQ. ANALYSIS

AND

THEY NEVER SEEM TO SHOW THE SAME RESULTS

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  #28  
Old 2004-12-09, 08:08 AM
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Re: Is this mp3?

Quote:
Originally Posted by Five
Here's screenshots of the analysis using EAC... keep in mind I've got a 2-second sample, so the sa is "zoomed in" compared to desert_rat's sa. I also attached two screenshots of the fa, 1st one at 512 fft size, and the 2nd at 65536 fft size (maximum). You can see the dropoff a lot better with the fft size at maximum!

THAT BRINGS UP ANOTHER FACTOR

I THINK YOU REALLY NEED TO ANALYZE AN ENTIRE TRACK IF NOT HE ENTIRE SOURCE TO BE MOST ACCURATE !
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  #29  
Old 2004-12-09, 08:17 AM
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Re: Is this mp3?

THIS IS WHAT IVE BEGUN TO USE

PAZ PSYCHOACOUSTIC ANALYZER


Realtime analyzer based on our hearing, shows 52 or 68 bands, with RMS, peak, weighting, variable integration time, and much more. Built on the math that the ear uses...See what you've been hearing.


More information
Perfect for mastering, trouble-shooting, environmental analysis and more.
See more of what your audio is really made of.
See peak or RMS frequency content and levels quickly.
Includes a Stereo Position Display for evaluating the 'spread' of the source.
PAZ uses wavelet techniques (as opposed to FFTs) to provide users with optimal graphic accuracy. Individual bands update independently for the fastest response and consequently increased accuracy and resolution. PAZ offers two distinctive real-time audio-analysis displays in addition to Peak/RMS metering:

A distinctive continuous-graph Frequency Display - showing 52 bands most closely resembling the ear's constant Q critical frequency bands.
A wavelet-based real-time analysis including RMS or Peak modes with dual channel or total-stereo-energy graphing from DC to Nyquist, and unweighted, C- and A- weighting modes.
Optional resolution in 10Hz steps can be shown for precise analysis below 250Hz for a total of 68 bands. The display can be zoomed into any area of the graph, all the way to -80dBFS. Level analysis can be saved to a text file. Level meters include L/R peak and summed average (RMS) display, with individually re-settable peak hold values. For fast operation, you can select just the meter you need from Analyzer, Pan, or VU - either all together, or each separately. The Stereo Position Display shows how energy is spread into the stereo field, including anti-phase information, all in an intuitive real-time vector display. This meter is unlike a phase meter, and can help you visualize the energy distributed in the stereo image.
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  #30  
Old 2004-12-09, 08:18 AM
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Re: Is this mp3?

P.s I Do Not Work For Waves

In Fact I No Longer Work At All !

Retired
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