All, Mark Knecht has run Benno Senoner's Latency Test program on ext2, ext3, fat32, and reiser filesystems and has graciously sent me his write-up and graphs. I have added these to my web page at http://myweb.cableone.net/eviltwin69/ALSA_JACK_ARDOUR.html. They're well worth checking out. After seeing his tests I ran a few quick tests of my own and have now switched filesystems! V/R Jan Depner