>>> Tim Hammerquist 15-Jun-05 19:59 >>>
>
> I don't have a 3.7 box handy to check this on, so if it works in 3.7,
> ignore this output:
That's the important part, isn't it? file(1) gets updated from time
to time :) The OP didn't specify which version of OpenBSD.
carbon $ dmesg | head -2
OpenBSD 3.7 (GENERIC) #50: Sun Mar 20 00:01:57 MST 2005
[EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
carbon $ mp3info ~/foo.mp3
/home/tom/foo.mp3 does not have an ID3 1.x tag.
carbon $ file ~/foo.mp3
/home/tom/foo.mp3: MP3, 128 kBits, 44.1 kHz, JStereo
A perusal of magic(5) shows that it's the beginning of the MP3 frame
info that is examined (the frame sync, the MPEG audio version ID, etc):
# MPEG 1.0 Layer 3
0 beshort&0xfffe =0xfffa \bMP3
>2 byte&0xf0 =0x10 \b, 32 kBits
>2 byte&0xf0 =0x20 \b, 40 kBits
:
:
>2 byte&0xf0 =0xE0 \b, 320 kBits
# freq
>2 byte&0x0C =0x00 \b, 44.1 kHz
>2 byte&0x0C =0x04 \b, 48 kHz
>2 byte&0x0C =0x08 \b, 32 kHz
Thanks
Tom
