3D sound now plays in 3D.
COM interfaces should be correct for buffers and 3D stuff. The COM
interface is broken on notifications but I will fix that next.
Fixed the bug when closing and opening the same or another sound
device quickly.
Fixed some locking but there is a lot of work left yet.
Dump the effective format and prepare the tone signal accordingly.
Play tones from the secondary buffers at -3dB rather than -12dB.
Always print the volume the tone is going to be played at.
Remove the gamedev URL.
basic tests such as querying its characteristics and changing its
format.
Changing the format requires that we call SetcooperativeLevel first,
which means we need an hwnd. So the test must now link with
user32.dll.