determining audio file size/CD bit rates

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Paunch

Well-known member
I had a program that would tell me the file size in MB, but it went all haywire and started feeding me misinformation.

I'm producing a film, musicians submit music to me in CDs and some use MP3's on the CD instead of a 16bit version.

I need a way to figure out the format and file size of the CD, Itunes doesn't work, nor does Audition....
 
A 16 bit 44.1 KHz audio file is approximately 10 MB per stereo minute, or 5 MB if mono. 48KHz is 10% longer but since the figures are approximate, you could still use the same math for estimations.

24 Bit is 50% longer, so 15MB stereo, 7.5 mono/min.

24 bit 96KHz is double again, so 30 MB stereo, 15 mono MB/min

Again, all figures are approximate.

A 128Kb/sec stereo MP3 or iTunes download (the default, usually) equals 960 KB/min, or roughly 1 MB/min which is 1/10th of the CD data rate.

MP3s can be made at many different rates though, so you'd need to know which a given file was to be sure. The highest MP3 rate is generally 320Kb/sec, which is 4x the usual 128Kb/sec, or about 4MB/min. The lowest is usually 64Kb/sec, or about .5MB/min.
 
thanks, but I don't have any program that tells me the data so I can determine whether the songs are in mP3 format or not. if I put a cd in my player, I need to have the specs come up so I can either use or not use a track.
 
Last edited:
Paunch said:
thanks, but I don't have any program that tells me the data so I can determine weather the songs are in mP3 format or not. if I put a cd in my player, I need to have the specs come up so I can either use or not use a track.
Click to expand...

If it's a regular CD, playable in a standard-issue CD audio player, then it can only be 16 bit 44.1KHz, or ~10 MB per minute.
 
thanks Ted, some of the material I'm working with is just a cheap burn onto a household CD....hence the need to check the data
 
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