Is it possible to detect if the source was audio-CD or some lossy form |
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Is it possible to detect if the source was audio-CD or some lossy form |
 Oct 3 2008, 17:01
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#1
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Group: Members Posts: 38 Joined: 21-February 03 Member No.: 5104  |
I have some CDs that I'm not sure if I burned them from mp3 files or if I made a 1 to 1 CD-copy. Is there a way to find out if the source was mp3 or CD? I have the original CDs as well, ripped to FLAC, for reference.
This post has been edited by gandhi: Oct 3 2008, 18:44 |
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Oct 3 2008, 17:09
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#2
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Group: Members Posts: 34 Joined: 17-September 08 From: Iceland Member No.: 58352 |
That could be a challenge, when making an audio CD all input will simply become CD audio. If the mp3s were very compressed you could just tell by bad sound quality.
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Oct 3 2008, 17:42
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#3
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Group: Members Posts: 102 Joined: 5-August 08 Member No.: 56722 |
If you also have the original CDs in FLAC and just want to compare the copy to those, then the easiest way is to rip one track from the copy to FLAC (or WAV), open both FLACs in some audio editor and compare the frequency spectrums (there is a tutorial somewhere here on this topic). If the copy was made from mp3, there will be noticable differences in the high frequencies. If the copy was made as a 1:1 image, they will be identical.
This post has been edited by Goratrix: Oct 3 2008, 17:42 |
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Oct 3 2008, 17:59
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#4
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Group: Members Posts: 325 Joined: 17-October 05 From: United States Member No.: 25178 |
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Oct 4 2008, 09:38
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#5
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Group: Members Posts: 38 Joined: 21-February 03 Member No.: 5104 |
Thanks, I tested Tau Analyzer and hopefully the results are trustworthy.
Goratrix: did you refer to this post? http://www.hydrogenaudio.org/forums/index....mp;#entry380510 This post has been edited by gandhi: Oct 4 2008, 09:38 |
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Oct 4 2008, 19:27
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#6
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Group: Members Posts: 3081 Joined: 1-September 05 From: SE Pennsylvania Member No.: 24233 |
QUOTE (Goratrix @ Oct 3 2008, 12:42)  If you also have the original CDs in FLAC and just want to compare the copy to those, then the easiest way is to rip one track from the copy to FLAC (or WAV), open both FLACs in some audio editor and compare the frequency spectrums (there is a tutorial somewhere here on this topic). If the copy was made from mp3, there will be noticable differences in the high frequencies. If the copy was made as a 1:1 image, they will be identical. You don't need to compare the spectra. Just use a bit comparison. Apart from a possible small shift in the data, they should be identical, or not. |
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 Oct 29 2008, 15:31
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#7
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Group: Members Posts: 8 Joined: 13-September 08 Member No.: 58232 |
You might also want to check out Informer... But yeah, like Pdq says, just do a bit comparison if you have the original files. Invert -> Copy -> Mix Paste
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Lo-Fi Version | Time is now: 22nd May 2013 - 16:35 |
