// update the previous system
	for (v = 0; v < voice_tb.length; v++) {
		st = par_sy.voices[v].st
		var	sy_staff = par_sy.staves[st],
			p_voice = voice_tb[v]
		if (p_voice.stafflines != undefined)
			sy_staff.stafflines = p_voice.stafflines
		if (p_voice.staffnonote != undefined)
			sy_staff.staffnonote = p_voice.staffnonote
		if (p_voice.staffscale)
			sy_staff.staffscale = p_voice.staffscale;
		sy_new.voices[v] = clone(par_sy.voices[v]);
		sy_new.voices[v].range = -1;
		delete sy_new.voices[v].second
	}
	for (st = 0; st < par_sy.staves.length; st++) {

			if (param[0] == 'f')
				s.stbrk_forced = true
		}
		sym_link(s)
		return
	case "stafflines":
	case "staffscale":
	case "staffnonote":
		set_v_param(cmd, param)
		return
	case "staves":
	case "score":
		if (parse.state == 0)
			return
		get_staves(cmd, param)