Im confused. I have changed the setting to 512 which isnt acceptable to use. The reason im confused is i’ve used toontrack solo to play superior 2.0 live and it worked brilliantly, with 128 buffer settings. Since then i upgraded Pro tools to version 7 from 6.4 and then onto pro tools 8. The only thing that would have changed was the mbox drivers, but they would have been updated. Before the PT updates everything was working fine, i may have performed other updates, maybe i’ve downloaded some new audio codecs i dont really know. All i know is that prob within the space of a few months solo has gone from perfect, to latency.