While working (ha) on my nasm patch (attached) I found few more patches https://www.freac.org/downloads-mainmenu-33/214-codec-sources-and-patches LAME v3.100: lame-3.100.tar.gz LAME v3.100 fast CRC processing patch: lame-3.100-fastcrc.diff TMKK's AltiVec optimization patch: lame-3.100-altivec-20171014.diff TMKK's SSE optimization patch: lame-3.100-sse-20171014.diff Vorbis v1.3.6: libvorbis-1.3.6.tar.gz Patch to add aoTuV beta 6.03 optimizations: libvorbis-1.3.6-aotuv-b6.03.patch Patch to add Lancer SSE optimizations: libvorbis-1.3.6-aotuv-b6.03-lancer.patch as far as I can see sse lame patch adds x86_64 support for some optimizations Libvorbis patches adds some ...retuning and also speed-up? Happy testing?