- x86 SSE, SSE2 and SSE4.1 intrinsics optimizations with run-time CPU detection contributed by Cisco Systems,
- MIPS intrinsics optimizations contributed by Imagination Technologies,
- ARM Neon optimizations contributed by Linaro and ARM,
- many architecture-independent optimizations and memory footprint reductions that should improve performance on all platforms, and
- several minor bug fixes.
The quality of the encoder should be mostly unchanged compared to version 1.1.
Source code: opus-1.1.1.tar.gz