Sampler: More Mute Groups needed

Some drumsets contain more than 8 drums. Since each drum has to be in its own mute group and set to one-shot mode, to model the response of a natural drum hit consecutively, there will not be enough mute groups for drumset that go beyond 1 kick, 1 snare, 1 hihat, 1 ride, 2 toms, 2 crash.