/* session must mediate group control */
rl.reset (new RouteList);
rl->push_back (shared_from_this());
- _session.set_mute (rl, !muted(), Session::rt_cleanup, group_override);
+ _session.set_mute (rl, val >= 0.5 ? true : false, Session::rt_cleanup, group_override);
return;
break;