Antex electronic SX-33E, SX-33B user manual Layer

In the Antex driver the bitrate is specified on a per-channel basis. Therefore, requesting 64 kbits/s and stereo will result in a 128 kbits/s compressed MPEG stream. Supported bitrates (per chan- nel) and compression ratios are as follows:

Layer I

32 Khz		44.1 Khz		48 Khz
Bitrate	Compression	Bitrate	Compression	Bitrate	Compression
(kbits/s)	ratio	(kbits/s)	ratio	(kbits/s)	ratio
32	16	32	22.1	32	24.0
64	8.0	64	11.0	64	12.0
96	5.3	96	7.4	96	8.0
		128	5.5	128	6.0
				160	4.8

Layer II

32 Khz		44.1 Khz		48 Khz
Bitrate	Compression	Bitrate	Compression	Bitrate	Compression
(kbits/s)	ratio	(kbits/s)	ratio	(kbits/s)	ratio
32	16	32	22.1	32	24
48	10.7	48	14.7	48	16
56	9.1	56	12.6	56	13.7
64	8.0	64	11.0	64	12.0
80	6.4	80	8.8	80	9.6
96	5.3	96	7.4	96	8.0
112	4.6	112	6.3	112	6.9
128	4.0	128	5.5	128	6.0
160	3.2	160	4.4	160	4.8
192	2.7	192	3.7	192	4.0
224*	2.3	224*	3.2	224*	3.4
256*	2	256*	2.8	256*	3.0
320*	1.6	320*	2.2	320*	2.4
384*	1.3	384*	1.8	384*	2.0

* These bitrates are available for mono files only.

Layer II uses a more sophisticated compression algorithm than Layer I, so it is recommended that Layer II be used wherever pos- sible.

39