These selectors are used to pass an atom list to the sound component.
Atoms are always in big-endian format.
The content of the new audio atom list can consist of many atoms, and always ends with the AudioTerminatorAtom. The first atom in the list should be the AudioFormatAtom, which specifies which sound component is responsible for the atoms contained within the list. If your application calls the SndGetInfo function with these two selectors, it will return a handle to an atom list. This handle is the responsibility of the caller to be disposed of. The SndSetInfo function requres a pointer to an atom list, and is the responsiblity of the caller to be disposed.