Hi Fernando, first of all thenk you for your help! I'm quite new to linux world, so I did not know until now that Envy24control accepted parameters:-P. I just runned Envy24control with -c parameter and the system correctly recognize the three cards installed (IRQ3, IRQ5, IRQ7). Now my problem is I can't find in Envy24control the option to set cards 1 and 2 (or hw:1 and hw:2) as slave: concerning hardware settings I can find only a table which let me choose the clock (from 22050 to 96000, plus s/pdif option) and "locked" and "reset" option can be activated after choosing the sample rate. I can't fund any other option in Envy24control which seems to help to set other boards as slaves. I also noticed that running BruteFir is not possible if I set S/pdif in sample rate options, BruteFir comes out with a "broken pipe error" at its start and exits. Thank you very much for your help, sorry for bother you! Michele P.S. You are doing an incredible job at PlanetCCarma! My best wishes! > It is not completely clear to me if you have run envy24control on the > other two cards to set them to slave to wordclock. Envy24control can be > directed to use a particular card with the "-c x" parameter, where x is > 0 for the first card, 1 for the second and so on and so forth. > > -- Fernando