procedure GetSupportedPrecisionHWs(Dst: TStrings);
Returns list of supported PrecisionHW values.
Result: stored in self (calling object)
Remarks:
This list can be empty, if ChannelCount is not accepted by the driver. Even if the function returns a specific PrecisionHW, the driver may still reject the configuration just before the playback or recording is about to start. This depends upon the quality of the driver implementation. Typically safe choices are (TCoreAudioPrecision) asp16, asp24, asp32 and asp32f.