working example of hrtf set the pref usehrtf to true to test
For now any mhr file that is in the game directory can be used, just run once to get the index of that mhr and pass that index in to $pref::SFX::hrtfProfile
DSound has since been deprecated and xaudio2 would require us to write our own 3d spatialization and mixer
Load devices the same way we load in the gfx end
setup sfx provider
run sfx devices on startup
various fixes around sfx null device
added the bitrate and samplerate globals
added the hrtf global code is in to use this but not setup yet
Adds speed of sound to the sound system
SFXAmbience now has a property for speed of sound for different mediums, can also be set directly
Ground work, this commit enables reverb zones and opens the slots for
other effects to be added later. Tested using the full template. Build
your openal dll and your full.exe use one of the environment presets and
it will work
