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andrew11joseph
posté sam. 22 avril 2006, 17:39
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Ok. My band recorded some songs yesterday using a Presonus firepod and Cubase LE, the software that came with it. We export the songs as .aif files. We play them in iTunes. If we convert them to mp3s in iTunes, the songs become significantly quieter compared to other songs. Thus the logical solution was to export them from Cubase directly as mp3s, which I though would have a better conversion process. However, some of the mp3s are quiet, and some are not. It seems to choose this randomly. We also tried to burn the aif files to a CD using iTunes, and it made the tracks in slow motion when you play the CD!!! If you try to convert the aif files to mp3 at any time, the tracks are in slow motion. Does anyone have any ideas that could possibly help me with my problem!? This is so frustrating.

Thanks,
Andrew
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lepetitmartien
posté dim. 23 avril 2006, 15:19
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It explains the slow down, when you play a 96 KHz files burned on an audio cd, you end up with a tune laying a bit more than twice slower (96/44.1= rate of playback slow down).

Bounce to 16/44.1 then make the MP3 wink.gif You're handling bit depth and sampling frequencies that are causing a problem to the MP3 conversion. (we could say MP3 has not been made for something else than compress audio cds…)(uh oh)

The sampling frequency explains the sloooooowing, and I guess the 24 bits are for something in the level issues.

BTW, recording at 48 or 96 KHz if you are not working for broadcast has absolutely no reason to be. If you have audio CDs in mind, 44.1 and multiples (88.2) are way more sensible. The conversion between 48/96… and 44.1/88.2… is nothing save obvious.

24 bit is good for noise levels and headroom, but you'll have to move to 16 bit in the end for audio CDs.


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