I can use MPCHC to play back mkv and switch between internal audio (embedded in mkv) and external audio (seperate audio file like flac) in Audio Switcher under filter list or right click and choose Audio. But whenever Reclock is active, I can't find a way to switch to external audio. There is no Audio Switcher in the filter list and Audio tab is grey out. Is there a solution to use Reclock and pick extenal audio under MPCHC ?