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#1
2005-03-12, 06:52 PM
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MP3 Scourced???
I am attaching a few screens shots. They only reason why I want some views because I do remember that recordings from FM broadcast can have drop offs similiar to mp3 scourced material.
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#5
2005-03-12, 07:08 PM
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Re: MP3 Scourced???
This is Tales of the Who which if I remembered downloaded from STG last summer
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#6
2005-03-12, 07:48 PM
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Re: MP3 Scourced???
mp3. Wish i could see the numbers a little better, but even without that, it looks bad.
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#7
2005-03-12, 07:51 PM
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Re: MP3 Scourced???
It doesn't look good, but I can't post anything conclusive yet...
can you show the spectral view zoomed in to 1.5-2 seconds? also, another SA with the FFT size set to max would help a little. check the link in my sig for detecting mp3-sourced stuff, EAC is a bit hard to read.
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#9
2005-03-12, 09:25 PM
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Re: MP3 Scourced???
hmmm...
how about Adobe Audition Spectral view, zoomed in on 2 seconds and also showing a full song? This doesn't look good to me so far.
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#10
2005-03-12, 10:38 PM
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Re: MP3 Scourced???
FM radio rolls off hard at around 15kHz. (The response is 15kHz wide and starts at 50Hz or so).
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#11
2005-03-14, 08:29 AM
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Re: MP3 Scourced???
I think it looks like non-mp3. The fact that the right and left channels each roll off at a different spot would be a dead giveaway.
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#12
2005-03-14, 08:51 PM
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Re: MP3 Scourced???
I wouldn't say so. mp3 encoders are not forced to use the same lowpass for both channels.
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#13
2005-03-14, 09:19 PM
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Re: MP3 Scourced???
Quote:
Actually, there is no lower frequency limit to FM broadcasting, only the 15kHz upper range (as you mentioned). Looking through the FCC Part 73 specs, I don't see anything addressing highpass filtering. (http://www.scott-inc.com/html/fccrules.htm) Also, see: http://www.radio-electronics.com/inf...ffm/vhf_fm.php for a pretty nice explanation of FM mux/demux. I guess I should add that the individual FM receiver will probably be the limiting factor, not the broadcast. No members have liked this post.
Last edited by wazoo2u; 2005-03-14 at 09:24 PM.
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#14
2005-03-15, 02:03 AM
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Re: MP3 Scourced???
I still wanna see Audition Spectral Analysis zoomed in on 2 seconds. I don't think we can draw any conclusions from what we see here.
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