475:/d/Genesis/newmagic/spell.c (/d/Genesis/newmagic/spell.c)
(public void) set_spell_vocal(int i)
/* 
 * Function name: set_spell_vocal
 * Description:   Indicate that the spell requires the caster to use his
 *                voice.  Such spells are not possible when the
 *                LIVE_M_MOUTH_BLOCKED property is true.
 * Arguments:     1. (int) If true, spell requires voice.
 * 
 * TODO:          Classify vocal spells as ACTION_AURAL.
 */
