Sound channel mode
stored on 2 bits in the file, values represent bit values
@:value(2)staticinlineread onlyCDualChannel:Int = 2
@:value(1)staticinlineread onlyCJointStereo:Int = 1
@:value(3)staticinlineread onlyCMono:Int = 3
@:value(0)staticinlineread onlyCStereo:Int = 0
staticenum2Num(c:ChannelMode):Int
staticnum2Enum(c:Int):ChannelMode