I am getting unexpected results when using the QP command. SSC32 manual indicates that channels can be grouped when using this command, so I tried both QP 1,2 and QP 1 2 . Sometimes I got back what I expected with the second form, other times what I got back was not even close. Not sure what is going on here. Please clarify at least which form of QP is correct, and whether there is a limit on the number of channels that can be specified at once. Many thanks.