float barpos = _fader_ctrl->internal_to_interface (_fader_ctrl->get_value());
int val = std::min (127.f, std::max (0.f, barpos * 128.f));
if (val != _last_barpos) {
float barpos = _fader_ctrl->internal_to_interface (_fader_ctrl->get_value());
int val = std::min (127.f, std::max (0.f, barpos * 128.f));
if (val != _last_barpos) {