Sequence of steps using the low-level code from PAS-16 SDK:

        1       InitMVSound()   connects to "mvsound.sys"
                call this once per program
                required - retrieves DMA/IRQ numbers from mvsound.sys

        2       InitPCM()       connects the IRQ/DMA    
                call this once per program, or
                after a call to RemovePCM()
                required

        3       PCMInfo()       set samplerate, datasize, mono/stereo
                call this each time the parameters change
                required - programs the timers and other hardware

        4       DMABuffer()     set the location, size, divisions
                call this each time the parameters change
                required

        5       UserFunc()      set your routine called at IRQ time
                call this each time you want a different routine
                optional - instead, you can poll a variable

        6a      PCMPlay()       start playing...
                required - unless you want to record!

        6b      PCMRecord()     start recording...
                required - duh.
        
        7       PausePCM()      pause play/record
                if desired

        8       ResumePCM()     resume paused play/record
                if you paused and want to resume!

        9       StopPCM()       stop IRQ/DMA activity
                required - unless you play/record into infinity!

        10      RemovePCM()     disconnect IRQ/DMA
                required - failure to call it before program
                terminates causes IRQ's to vector to code that
                is no longer there!