tained for a given output bitrate therefore changes with sample rate.

In the Antex software the bitrate is specified on a per-channel ba- sis. Therefore, requesting 64 kbits/s and stereo will result in a 128 kbits/s compressed MPEG stream. Supported bitrates (per channel) 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.

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Antex electronic SX-36, SX-6, SX-34, SX-5e user manual KHz 44.1 KHz 48 KHz