Get extra info from MP3 file

Explains which bytes are used, and how, to store info about bit-rate, frequency, channels...

Original Author: David Filipovic

Code









2nd byte has to be in between [F2,F7] or [FA,FF],

and the info extracted from 2nd byte is as follows:

Value	MPEG, Layer	CRC
F2	MPEG 2.0, Layer 3	Yes
F3	MPEG 2.0, Layer 3	No
F4	MPEG 2.0, Layer 2	Yes
F5	MPEG 2.0, Layer 2	No
F6	MPEG 2.0, Layer 1	Yes
F7	MPEG 2.0, Layer 1	No

 

Value	MPEG, Layer	CRC
FA	MPEG 1.0, Layer 3	Yes
FB	MPEG 1.0, Layer 3	No
FC	MPEG 1.0, Layer 3	Yes
FD	MPEG 1.0, Layer 3	No
FE	MPEG 1.0, Layer 3	Yes
FF	MPEG 1.0, Layer 3	No

3rd byte has to be in between [1x,Fx] (Where x is between [0,B]),

and the info extracted from 3rd byte is as follows:

Value (x)	MPEG 1.0 Frequency	MPEG 2.0 Frequency
[0,3]	44 KHz	22 KHz
[4,7]	48 KHz	24 KHz
[8,B]	32 KHz	16 KHz

Value	MPEG 1.0 Bit-rate	MPEG 2.0 Bit-rate
1x	32 Kbit	8 Kbit
2x	40 Kbit	16 Kbit
3x	48 Kbit	24 Kbit
4x	56 Kbit	32 Kbit
5x	64 Kbit	40 Kbit
6x	80 Kbit	48 Kbit
7x	96 Kbit	56 Kbit
8x	112 Kbit	64 Kbit
9x	128 Kbit	80 Kbit
Ax	160 Kbit	96 Kbit
Bx	192 Kbit	112 Kbit
Cx	224 Kbit	128 Kbit
Dx	256 Kbit	144 Kbit
Ex	320 Kbit	160 Kbit

4rd byte is of type ax(hex), where a is between [0,F], and x is between [0,F],

and the info extracted from 3rd byte is as follows:

Value (a)	Original	Emphasis	Copyright
0	No	None	No
1	No	50/15 microsec	No
2	No	Invalid	No
3	No	CITT j. 17	No
4	Yes	None	No
5	Yes	50/15 microsec	No
6	Yes	Invalid	No
7	Yes	CITT j. 17	No
8	No	None	Yes
9	No	50/15 microsec	Yes
A	No	Invalid	Yes
B	No	CITT j. 17	Yes
C	Yes	None	Yes
D	Yes	50/15 microsec	Yes
E	Yes	Invalid	Yes
F	Yes	CITT j. 17	Yes

Value (x)	Channels
[0,3]	Stereo
[4,7]	Joint Stereo
[8,B]	2 Channels
[C,F]	Mono






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Posted: 2002-06-01
By: ArchiveBot
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Visual Basic 6

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