SOUND is a list of the form `(sound KEYWORD VALUE...)'.
The following keywords are recognized:
:file FILE - read sound data from FILE. If FILE isn't an
absolute file name, it is searched in `data-directory'.
:data DATA - read sound data from string DATA.
Exactly one of :file or :data must be present.
:volume VOL - set volume to VOL. VOL must an integer in the
range 0..100 or a float in the range 0..1.0. If not specified,
don't change the volume setting of the sound device.
:device DEVICE - play sound on DEVICE. If not specified,
a system-dependent default device name is used.
Note: :data and :device are currently not supported on Windows.