Codec 2
| Codec 2 | |
|---|---|
| Developer(s) | David Grant Rowe | 
| Initial release | August 25, 2010 | 
| Stable release | 1.2.0
   / June 24, 2023 | 
| Repository | github | 
| Written in | C99 | 
| Platform | Cross-platform | 
| Type | Audio codec | 
| License | GNU LGPL, v2.1 | 
| Website | www | 
Codec 2 is a low-bitrate speech audio codec (speech coding) that is patent free and open source. Codec 2 compresses speech using sinusoidal coding, a method specialized for human speech. Bit rates of 3200 to 450 bit/s have been successfully created. Codec 2 was designed to be used for amateur radio and other high compression voice applications.