+ LIBARDOUR_API extern DebugBits BackendMIDI;
+ LIBARDOUR_API extern DebugBits BackendAudio;
+ LIBARDOUR_API extern DebugBits BackendTiming;
+ LIBARDOUR_API extern DebugBits BackendThreads;
+ LIBARDOUR_API extern DebugBits BackendPorts;
+ LIBARDOUR_API extern DebugBits VSTCallbacks;
+ LIBARDOUR_API extern DebugBits FaderPort;
+ LIBARDOUR_API extern DebugBits VCA;
+ LIBARDOUR_API extern DebugBits Push2;
+