#1958153 - 06/15/08 05:58 PM
Does Ripping or Burning a CD Compress Sound?
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cassius
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[Sorry for making two posts so quickly. I don't mean to be spamming the boards.]
I am working on a recording a just noticed that after I burned the master to my computer, the bass part seemed to come out more. Am I just hearing things?
This is fairly important to me because the project is the master from my band's studio time six months ago. We're literally a day or two away from sending everything to the manufacturer, so this is big stuff! (To me.)
Thanks for your help. I posted this to the EQ forums but a) it's semi-bass related and b) there are more viewers/posters here. Mucho obrigado.
cassius
EDIT: Yeah, I think I'm crazy. I did a blindfold test and I can't distinguish anything. Sorry folks.
Edited by cassius (06/15/08 06:51 PM)
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#1958160 - 06/15/08 06:11 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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jeremy c
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Did the file type get changed?
mp3 files are nothing at all like whatever file format the master is in.
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#1958162 - 06/15/08 06:18 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: jeremy c]
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getz76
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Not enough information.
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#1958166 - 06/15/08 06:29 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: getz76]
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cassius
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AIFF > M4A (rip) > AIFF (burn). Sorry.
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#1958180 - 06/15/08 06:59 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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getz76
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I am confused. You ripped it and then burned it? Any reason for that?
How about sample rate and bit-depth on the original recording?
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#1958190 - 06/15/08 07:22 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: getz76]
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cassius
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I got a master from the studio; the sample rate was either 96 or greater. I remember it being very high, the files were very big. I'm sorry, this was a while back (months ago) and I don't recall. As for bit-depth, I am not even familiar with the term. Sorry I am so lacking in info for you.
Then next thing I did was put the files on my iTunes library. I noticed driving in my car, listening to the CD that I had burned off of these ripped files (as in they had been ripped to my computer from the studio master CD-R, sorry if this is the wrong way to use this term), that the bass stood out a little bit more, just enough for me to like it.
I just did some blindfold tests and can't tell a difference anymore. So I may just be crazy.
Oh, and the reason I ripped and burned was so I wouldn't be taking the studio master out and about and scratching it.
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#1958225 - 06/15/08 08:35 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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jeremy c
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If the files became M4A files and then AIFF files again, you definitely lost something in translation.
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#1958226 - 06/15/08 08:36 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: jeremy c]
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cassius
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Okay. Maybe my ears weren't so misguided. I'll keep listening.
Thanks.
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#1958323 - 06/16/08 05:58 AM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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getz76
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Why not just make a copy of the CD?
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#1958387 - 06/16/08 08:24 AM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: getz76]
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yourlord
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If the master CD plays in a standard CD player then they are 44KHz 16 bit files. Rip to wave files then burn the wav files to an audio CD. That's the easiest method, and you won't lose any quality that way.
Or as getz suggested, if it's a standard audio cd, just copy it directly.
I think itunes stores audio in m4a files using the aac codec which is a lossy codec. The music you get out of it will be degraded when compared to the original.
I'm not that familiar with itunes as I use amarok for my music collection management. m4a is just a container format, so it technically could be all kinds of payloads in any number of formats, including lossless audio, so not knowing itunes very well, I can't be certain what you have there..
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#1958487 - 06/16/08 11:36 AM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: getz76]
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mattulator
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Why not just make a copy of the CD? 
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#1958510 - 06/16/08 12:36 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: yourlord]
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cassius
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Why not just make a copy of the CD?
The master? I already have. That is the copy I speak of that sounds different to me, burned from the files I stored on iTunes in m4a, if ever so slightly. Or did I misread your question?
I think itunes stores audio in m4a files using the aac codec which is a lossy codec. The music you get out of it will be degraded when compared to the original.
Pretty sure I'm burning things to an "AAC Apple Lossless" format. I will check. That may effect the outcome here.
...Also I think I may not be clear enough. I am actually kind've HOPING this process degraded the files a bit or compressed them somehow because it seemed to boost the bass and percussion just a hair so that they are competing better with the guitar, keys, and vocals. That is, if my ears aren't just wanting to hear it. Obviously I still have the original master if I need to make a conservative, lossless version.
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#1958545 - 06/16/08 01:20 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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jeremy c
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Don't rip the files and then make a new cd.
Just use the built-in cd burning program in your computer to make an exact duplicate of the master.
Listen on a variety of players, your home, your car, a portable through headphones.
If you want it eq'd a little differently, you can go back to the studio and have it remastered. That shouldn't take more than an hour.
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#1958553 - 06/16/08 01:49 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: cassius]
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yourlord
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If it's lossless then there should be no difference between the original and the copy, UNLESS the codec in question has some kind of a bug that alters the data..
rip a cd track to wav format, then rip one to m4a, then decode the m4a to a wav file..
There *should* be no binary difference between the files, though the wav headers *could* differ, so the best way to test this is decode both to raw pcm data and do a binary comparison of the 2.. There should be no difference in those 2 files. If there is, then your lossless codec is not lossless..
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#1958579 - 06/16/08 02:33 PM
Re: Does Ripping or Burning a CD Compress Sound?
[Re: yourlord]
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cassius
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I was wrong. My particular AAC is the standard lossy. My bad.
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