/* specialize for bool because of set_value() semantics */
namespace ARDOUR {
- template<> void MPControl<bool>::set_value (double v) {
+ template<> void MPControl<bool>::set_value (double v, PBD::Controllable::GroupControlDisposition /*group_override*/) {
bool newval = fabs (v) >= 0.5;
if (newval != _value) {
_value = newval;