tunes.push([tsfirst, voice_tb, info, cfmt])
		tsfirst = null
	}
}

// transpose a key
function key_transp(s) {
	if (s.k_none)			// no key
		return

    var	n, a_acc, b40, d

	// set the score transposition
	n = (curvoice.score | 0)
		+ (curvoice.shift | 0)
		+ (cfmt.transp | 0)
	if (n)
		curvoice.tr_sco = n		// b40 interval
	else if (curvoice.tr_sco)
		curvoice.tr_sco = 0

	if (!curvoice.tr_sco)
		return

	b40 = (s.k_b40 + 200 + curvoice.tr_sco) % 40
	d = abc2svg.b40k[b40] - b40
	if (d) {
		if (curvoice.tr_sco > 0)
			curvoice.tr_sco -= d