is it possible to detect mp3 sourced CDs? |
is it possible to detect mp3 sourced CDs? |
 Dec 14 2002, 10:48
Post
#1
|
|
 Group: Members Posts: 21 Joined: 30-September 02 From: England Member No.: 3457  |
hi
i trade bootlegs and don't like receiving mp3 sourced bootlegs. Is there a sure fire way i can analyze the CD to tell if it is mp3 sourced. For instance, if i extracted one of the tracks to wav and did a frequency analysis in Cool Edit Pro 2 would that show the frequency clipping etc. Any help is appreciated. stuart |
 |
 
|
 |
|
Oct 14 2003, 03:56
Post
#2
|
|
|
Group: Members Posts: 42 Joined: 6-March 03 Member No.: 5355 |
Hello all. I've resurrected this thread for some help. I bought a live CD off ebay (the seller did not mention it was on CD-R, but I've reported him). I'm trying to determine whether it's made out of MP3s, in which case I'd be pissed (more so). I figured I could tell from listening, but it's hard to know what is the result of compression and what is a result of recording conditions. Supposedly, it was recorded in a radio station studio or something like that. I tested a lot of files and I'm posting a couple examples to prove my point (or confusion).
A WAV file (Little Steven - Born Again Savage) Notice how the bars reach the top, I assume color is intensity?  A nice LAME 3.90.2 file(Southside Johnny - Sirens Of The Night), looks very similar, but frequency cutoff is obvious (it's 20100)  A much worse example, LAME 3.93 (Joe Grushecky - Brand New Cadillac) (cutoff is around 14000)  And now the CD I just bought. I can't really decide whether there's a cutoff or just an interuption, either way it doesn't look like any of the other files I've looked at. Or is everything above ~16000 just noise from the recording perhaps? 
This post has been edited by BadReligionPR: Oct 14 2003, 03:57 |
|
|
|
studavis is it possible to detect mp3 sourced CDs? Dec 14 2002, 10:48
cd-rw.org This is a good question. I presume that quite a fe... Dec 14 2002, 12:38 CiTay With a little practice, it's quite easy to see... Dec 14 2002, 12:42 LordSyl The frequency analysis is also an accurate way of ... Dec 14 2002, 13:51 ssamadhi97 yep, spectral view is the way to go. it's the ... Dec 14 2002, 14:41 Saxtus This is true for MP3 indeed!
BTW, OGG files do... Dec 14 2002, 17:53 M All right, but what about audio which was recorded... Dec 14 2002, 18:17 buzzy You can sometimes tell if a recording is MP3 sourc... Dec 15 2002, 00:27 amano HMM. an interesting topic. is there really no tool... Dec 30 2002, 18:16 Volcano QUOTE what do you recommend?? EAC??
EAC's Wav... Dec 30 2002, 19:08 amano bad luck
so we all have to guess from the spectra... Dec 30 2002, 20:25 Oge_user After spectral analysis you can encode one track i... Jan 1 2003, 16:44 kdo People say there is such a beast as inverse decode... Jan 2 2003, 01:34 amano hmm. I think I figured everything out. it works qu... Jan 4 2003, 18:45 rc55 Heh, I came across a method quite by surprise... p... Jan 4 2003, 18:58 amano sounds funny. and... it works??? Jan 4 2003, 19:00 buzzy QUOTE (Oge_user @ Jan 1 2003 - 10:44 AM)After... Jan 5 2003, 23:41 tigre QUOTE (rc55 @ Jan 4 2003 - 09:58 AM)Heh, I ca... Feb 12 2003, 18:35 SometimesWarrior QUOTE (tigre @ Feb 12 2003 - 09:35 AM)I found... Feb 12 2003, 22:21 tigre QUOTE (SometimesWarrior @ Feb 12 2003 - 01:21... Feb 12 2003, 23:04 indybrett QUOTE (LordSyl @ Dec 14 2002, 07:51 AM)any or... Oct 14 2003, 04:45 NeoRenegade Looks like bad recording to me.
Look at that soli... Oct 14 2003, 04:48 robenroute The 19 kHz line definitely smells like a pilot ton... Oct 14 2003, 05:25 BadReligionPR QUOTE (robenroute @ Oct 13 2003, 08:25 PM)The... Oct 14 2003, 06:07 sony666 QUOTE (LordSyl @ Dec 14 2002, 02:51 PM)The fr... Oct 14 2003, 06:28 Jojo QUOTE (sony666 @ Oct 13 2003, 09:28 PM)Nevert... Oct 14 2003, 13:02 MuMart A good realtime spectrascope is an easy way to tel... Oct 14 2003, 14:33
Cyaneyes Another thing to consider: if a show was recorded ... Oct 15 2003, 06:20 cd-rw.org Sorry to bounce an ancient thread, but...
Is just... Feb 9 2005, 07:34 M QUOTE (cd-rw.org @ Feb 9 2005, 01:34 AM)... Feb 9 2005, 07:54 esa372 QUOTE (M @ Feb 8 2005, 10:54 PM)QUOTE (cd... Feb 9 2005, 17:50 |
|
Lo-Fi Version | Time is now: 25th May 2013 - 10:06 |
