// Buttons.
optional MIDIButtonProto preview = 18;
optional int32 preview_bank = 19;
- optional MIDILightProto preview_enabled = 20;
+ optional MIDILightProto preview_playing = 41;
+ optional MIDILightProto preview_ready = 20;
optional MIDIButtonProto queue = 21;
optional int32 queue_bank = 22;