Add 32/512-byte block MSADPCM support
Add "support" for streaming WaveBanks'
DynamicSoundEffectInstance scribbled in.
Starting to get rid of defs for Audio.
Update SDL2 csproj for audio changes
SoundEffect defs removed
Unused variable
Unnecessary using statements
Fix SoundEffect static properties, add some FIXMEs
Merge from upstream MG-SDL2