Undocumented constants #PVLEFT and #PVRIGHT

There are 2 undocumented constants: #PVLEFT and #PVRIGHT (they're in the autocomplete, but not the # help menu). They're meant to be used with PCMVOL [Channel% , ] Volume% #PVLEFT = Pcm Volume LEFT = 0 #PVRIGHT = Pcm Volume RIGHT = 1