| Codec | Format | Description |
| 0 | 0 | GSM 6.10 (8 KHz, 16 bit) 1625 bytes/sec |
| 0 | 1 | GSM 6.10 (11 KHz, 16 bit) 2210 bytes/sec |
| 0 | 2 | GSM 6.10 (22 KHz, 16 bit) 4420 bytes/sec |
| 0 | 3 | GSM 6.10 (44 KHz, 16 bit) 8905 bytes/sec |
| 1 | 0 | DSP Group TrueSpeech (8 KHz, 16 bit) 1056 bytes/sec |
| 2 | 0 | Lernout & Hauspie (8 KHz, 16 bit) 600 bytes/sec |
| 3 | 0 | Speex (8 KHz, 16 bit, 0 Qlty) 424 bytes/sec |
| 3 | 1 | Speex (8 KHz, 16 bit, 1 Qlty) 620 bytes/sec |
| 3 | 2 | Speex (8 KHz, 16 bit, 2 Qlty) 865 bytes/sec |
| 3 | 3 | Speex (8 KHz, 16 bit, 3 Qlty) 1110 bytes/sec |
| 3 | 4 | Speex (8 KHz, 16 bit, 4 Qlty) 1110 bytes/sec |
| 3 | 5 | Speex (8 KHz, 16 bit, 5 Qlty) 1502 bytes/sec |
| 3 | 6 | Speex (8 KHz, 16 bit, 6 Qlty) 1502 bytes/sec |
| 3 | 7 | Speex (8 KHz, 16 bit, 7 Qlty) 1922 bytes/sec |
| 3 | 8 | Speex (8 KHz, 16 bit, 8 Qlty) 1922 bytes/sec |
| 3 | 9 | Speex (8 KHz, 16 bit, 9 Qlty) 2384 bytes/sec |
| 3 | 10 | Speex (8 KHz, 16 bit, 10 Qlty) 3168 bytes/sec |
| 3 | 11 | Speex (16 KHz, 16 bit, 0 Qlty) 620 bytes/sec |
| 3 | 12 | Speex (16 KHz, 16 bit, 1 Qlty) 865 bytes/sec |
| 3 | 13 | Speex (16 KHz, 16 bit, 2 Qlty) 1110 bytes/sec |
| 3 | 14 | Speex (16 KHz, 16 bit, 3 Qlty) 1355 bytes/sec |
| 3 | 15 | Speex (16 KHz, 16 bit, 4 Qlty) 1698 bytes/sec |
| 3 | 16 | Speex (16 KHz, 16 bit, 5 Qlty) 2188 bytes/sec |
| 3 | 17 | Speex (16 KHz, 16 bit, 6 Qlty) 2678 bytes/sec |
| 3 | 18 | Speex (16 KHz, 16 bit, 7 Qlty) 3070 bytes/sec |
| 3 | 19 | Speex (16 KHz, 16 bit, 8 Qlty) 3560 bytes/sec |
| 3 | 20 | Speex (16 KHz, 16 bit, 9 Qlty) 4344 bytes/sec |
| 3 | 21 | Speex (16 KHz, 16 bit, 10 Qlty) 5324 bytes/sec |
| 3 | 22 | Speex (32 KHz, 16 bit, 0 Qlty) 669 bytes/sec |
| 3 | 23 | Speex (32 KHz, 16 bit, 1 Qlty) 1061 bytes/sec |
| 3 | 24 | Speex (32 KHz, 16 bit, 2 Qlty) 1306 bytes/sec |
| 3 | 25 | Speex (32 KHz, 16 bit, 3 Qlty) 1551 bytes/sec |
| 3 | 26 | Speex (32 KHz, 16 bit, 4 Qlty) 1943 bytes/sec |
| 3 | 27 | Speex (32 KHz, 16 bit, 5 Qlty) 2433 bytes/sec |
| 3 | 28 | Speex (32 KHz, 16 bit, 6 Qlty) 2874 bytes/sec |
| 3 | 29 | Speex (32 KHz, 16 bit, 7 Qlty) 3266 bytes/sec |
| 3 | 30 | Speex (32 KHz, 16 bit, 8 Qlty) 3756 bytes/sec |
| 3 | 31 | Speex (32 KHz, 16 bit, 9 Qlty) 4540 bytes/sec |
| 3 | 32 | Speex (32 KHz, 16 bit, 10 Qlty) 5520 bytes/sec |
