Hi , are you running Win XP ?? it seems most stable with XP .... Pitchy ?? I don"t have a problem like that but I mostly record bass/guitar and drums , im not not much of a Vocalist ....... I also don"t use the Mic inputs on the Delta 1010LT , I use a seperate mic preamp unit plugged into the RCA"s ...... I don"t think Pitchyness would be caused by the Delta card or lack of room treatment , probably caused by pitchy singing ..... Maybe more info about your setup and a better description of the problem would help me help you .... Cheers