Recommended Sampling Rate and Bitrate Combinations for AAC codec¶
This table is from the documentation included in the FDK AAC library source code.
| Audio Object Type | Bit Rate Range [bit/s] |
Supported Sampling Rates [kHz] |
Recommended Sampling Rate [kHz] |
Number of Channels |
|---|---|---|---|---|
| HE-AAC v2 (AAC LC + SBR + PS) |
8000 - 11999 | 22.05, 24.00 | 24.00 | 2 |
| 12000 - 17999 | 32.00 | 32.00 | 2 | |
| 18000 - 39999 | 32.00, 44.10, 48.00 | 44.10 | 2 | |
| 40000 - 56000 | 32.00, 44.10, 48.00 | 48.00 | 2 | |
| HE-AAC (AAC LC + SBR) |
8000 - 11999 | 22.05, 24.00 | 24.00 | 1 |
| 12000 - 17999 | 32.00 | 32.00 | 1 | |
| 18000 - 39999 | 32.00, 44.10, 48.00 | 44.10 | 1 | |
| 40000 - 56000 | 32.00, 44.10, 48.00 | 48.00 | 1 | |
| 16000 - 27999 | 32.00, 44.10, 48.00 | 32.00 | 2 | |
| 28000 - 63999 | 32.00, 44.10, 48.00 | 44.10 | 2 | |
| 64000 - 128000 | 32.00, 44.10, 48.00 | 48.00 | 2 | |
| AAC LC | 8000 - 15999 | 11.025, 12.00, 16.00 | 12.00 | 1 |
| 16000 - 23999 | 16.00 | 16.00 | 1 | |
| 24000 - 31999 | 16.00, 22.05, 24.00 | 24.00 | 1 | |
| 32000 - 55999 | 32.00 | 32.00 | 1 | |
| 56000 - 160000 | 32.00, 44.10, 48.00 | 44.10 | 1 | |
| 160001 - 288000 | 48.00 | 48.00 | 1 | |
| AAC LC | 16000 - 23999 | 11.025, 12.00, 16.00 | 12.00 | 2 |
| 24000 - 31999 | 16.00 | 16.00 | 2 | |
| 32000 - 39999 | 16.00, 22.05, 24.00 | 22.05 | 2 | |
| 40000 - 95999 | 32.00 | 32.00 | 2 | |
| 96000 - 111999 | 32.00, 44.10, 48.00 | 32.00 | 2 | |
| 112000 - 320001 | 32.00, 44.10, 48.00 | 44.10 | 2 | |
| 320002 - 576000 | 48.00 | 48.00 | 2 |
