The sound's sampling rate is 'srate' (if loaded into Snd),
or 'mus-sound-srate' (if not in Snd).
(srate 0)
(mus-sound-srate "oboe.snd")
To set the sync field of all but the selected sound,
(for-each
(lambda (snd)
(if (not (= snd (selected-sound)))
(set! (sync snd) 1)))
(sounds))