Opus release 1.5.1 Fixed meson build from Opus 1.5. Opus 1.5 is the first release to make extended use of ML in the encoder and decoder. Major changes since 1.4 include: - Significant improvement to packet loss robustness using Deep Redundancy (DRED) - Improved packet loss concealment through Deep PLC - Low-bitrate speech quality improvements down to 6 kb/s wideband - Improved x86 (AVX2) and ARM (Neon) optimizations - Support for 4th and 5th order ambisonics