= unsmob_duration (get_music ()->get_property ("partial-duration")))
{
Context *ctx = get_outlet ();
Moment now = ctx->now_mom ();
if (now.main_part_ > Rational (0))
= unsmob_duration (get_music ()->get_property ("partial-duration")))
{
Context *ctx = get_outlet ();
Moment now = ctx->now_mom ();
if (now.main_part_ > Rational (0))