IPB

Welcome Guest ( Log In | Register )

is it possible to detect mp3 sourced CDs?
studavis
post 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
Go to the top of the page
+Quote Post
 
Start new topic
Replies
BadReligionPR
post Oct 14 2003, 06:07
Post #2





Group: Members
Posts: 42
Joined: 6-March 03
Member No.: 5355



QUOTE (robenroute @ Oct 13 2003, 08:25 PM)
The 19 kHz line definitely smells like a pilot tone to me. Pilot tones are usually used for transmitting purposes....

Some background information

My father (an old ham radio nut) just sent me an explanation of pretty much the same thing, so I think it was indeed recorded off radio (his reasons: only noise after ~15KHz, 19KHz stereo pilot carrier). He also said most receivers would take the signal out though, so don't know why it's still there. I feel a little better that at least it wasn't made out of radio=>mp3=>cd. But I guess there is little left to lose going to mp3 anyway, since everything above 15KHz is crap anyways.

Well thank you all for the helpful replies, I certainly was not expecting them that quickly.

P.S. Is it true some people can hear that tone? Looks pretty high amplitude, would it hurt their ears if they could?
Go to the top of the page
+Quote Post

Posts in this topic
- 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
- - BadReligionPR   Hello all. I've resurrected this thread for s...   Oct 14 2003, 03:56
- - 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


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 20th August 2014 - 06:51