Opus 1.1 includes:
- New analysis code and tuning that significantly improves encoding quality, especially for variable-bitrate (VBR)
- Automatic detection of speech or music to decide which encoding mode to use
- Surround with good quality at 128 kbps for 5.1 and usable down to 48 kbps
- Speed improvements on all architectures, especially ARM, where decoding uses around 40% less CPU and encoding uses around 30% less CPU
These improvements are explained in more details in Monty’s demo (updated from the 1.1 beta demo).
Source code: opus-1.1.tar.gz