Mp3 Re-compression

[antsfightdirty]

hello, i'm new on this board, so don't yell at me if this question's been answered already :) heh

ok my whole mp3 collection is in 192kbps, if i burn that on a cd, and someone wants to rip it back into mp3's at 192kbps, will there be quality loss? or will it be exactly the same as the original mp3 rip?

thanks :)

[Adster]

well if u burned it as data it won't matter u wouldn't need to rip it again

personally I see no change in quality if you have burned it as audio then re enocded it again at 192 bit. som eppl may argue with me on that however

[antsfightdirty]

yep that's what i meant, audio cd.

i'm not sure how audio compressions work but with some image compression each time you compress it you lose more and more data, until you end up with a horrible looking image. just want to know that the same deal doesn't apply to audio.

i have a feeling that it doesn't , that both original rip and secondary rip would be undistinguishable from each other. i don't know the exact terminology but with audio compression it would select a certain band and every time it would be the same. if someone can enlighten me and point to a few sites it'd be muchly appreciated :)

[sparsely]

I don't know if this is 100% accurate...but here's my take on it:

If I download an mp3 album encoded @ 192kbps, then burn it as an audio CD (.cda), I have to rip the burned
CD if I want the mp3's back (unless I wanna download it again).
So if I rip the CD that I burned...say you rip em as .wav's, then encode them at a Constant Bit Rate of 192kbps...
you're actually losing quality from the previous burn...does that make sense?

Because mp3 is a lossy codec, when it was originally encoded @ 192, some data was discarded.
Then the 192kbps tracks were burned. If I then wanted to rip
it, I'd either have to rip it @ 320, or leave it as a .wav, to have the same quality that it was originally (192).

If I encode the rips @192, it's probably gonna lose a little more than it did the original time it was encoded @192,
unless I use exactly the same encoder, even then it would likely differ a bit.

I hope that makes sense. It's something I've wondered/thought about a time or two myself.
I could be wrong.....any professional opinions?

[DrSpud]

Wouldn't it be easier to just burn the mp3's on a data disc? ;)

[sparsely]

No good if you want to play it in a non-mp3 compatible player....
but backing the mp3s up on a data disc is a good idea, and something I've practiced in the past.