try.
PHP Code:
#include <amxmodx>
new const szSound[] = "yoursound.wav"
public plugin_init()
register_clcmd("say", "cmd_Say")
public plugin_precache()
precache_sound(szSound)
public cmd_Say(id)
{
new players[32], pnum, Uid, x
get_players(players, pnum, "e")
for( x = 0; x < pnum; x++)
{
Uid = players[x]
client_cmd(Uid, "spk sound/%s", szSound)
}
}