Streaming Audio Keyword
This keyword specifies that the frame is a request to play a streaming audio data file. Used for playing long audio files that would be a pain to buffer in main memory with the <wav> keyword or files that are compressed and therefore not readable at all with the <wav> keyword. See
Streaming Audio at the end of the Digital Video discussion.
By default this keyword assumes a .WAV file extension, if you are playing sound files with other extensions such as .MP3 you will have to specify the extension in the file name.
If the playback needs to be abortable
can be used, if the playback needs to be contingent upon a subject's response (or
some other condition I can't currently imagine)
can be used (see jobstatus example).