Hello all, With bluez-4.25 release I hope that the SBC encoder sound quality issues are now solved (though this is yet to be confirmed). Nevertheless, I think it is time to focus on performance :) The attached patch contains code preparations which are needed for SIMD optimizations for the analysis filter. Also theoretically it should be possible to tweak code to have both 32-bit and 16-bit fixed point analysis filter compiled in and switch between them at runtime (at user's request or semi-intelligently depending on audio bitrate). This patch should be stable and ready to be committed. Best regards, Siarhei Siamashka