sound_type snd_make_siosc(LVAL lis, rate_type sr, double hz, time_type t0, sound_type s_fm);
sound_type snd_siosc(LVAL lis, rate_type sr, double hz, time_type t0, sound_type s_fm);
    /* LISP: (snd-siosc ANY ANYNUM ANYNUM ANYNUM SOUND) */