Hi,
I found out that some machines ignore set c audio all off which was in the testsuite, while others react to it and even update the system preferences volume mixer control if it happens to be open.
I don't know whether that difference depends on the HW (CD-ROM driver) or the OS. You can find it out by posting your results here.
I'm now using set c audio all on (which should be the default) such that all users running the testsuite get to hear something.
https://testbot.winehq.org/JobDetails.pl?Key=4434 mcicda.c:612: Test failed: STOP all returned MCIERR_HARDWARE (I fixed that, but not yet on testbot).
Regards, Jörg Höhle