OK. I examined every Makefile, found the CFLAGS and CXXFLAGS settings for non-debug builds, added -march=native to every one. It's definitely using them, building is visibly slower now. I ran it, same results: [jeb@youngdavid daw]$ non-mixer WARNING: File /usr/lib64/ladspa/ladspa-rubberband.cat could not be examined dlerror() output: /usr/lib64/ladspa/ladspa-rubberband.cat: invalid ELF header 130 plugins found in 103 libraries [non-mixer] Your fun is over I then decided to see what is going on with ladspa-rubberband.cat. I found profound weirdness: [jeb@youngdavid daw]$ file /usr/lib64/ladspa/ladspa-rubberband.cat /usr/lib64/ladspa/ladspa-rubberband.cat: ASCII text [jeb@youngdavid daw]$ cat /usr/lib64/ladspa/ladspa-rubberband.cat ladspa:ladspa-rubberband:rubberband-pitchshifter-mono::Frequency > Pitch shifters ladspa:ladspa-rubberband:rubberband-pitchshifter-stereo::Frequency > Pitch shifters It is rather clear that non-mixer is trying to treat /usr/lib64/ladspa/ladspa-rubberband.cat as a binary, looking for an ELF header. It is just as clear, above, that the standard Fedora 13 file of this name and location is an ASCII text configuration file of some kind, not a binary at all. Anyone know what should be done next? J.E.B. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user