Actually,looking at this again, I notice that the midi track generated by RealChart is called RC2483:Bass. I assigned various midi devices but still get no response on the sound. But, when I copy the actual midi data to a new track and assign a vst I get the sound as I would expect. The original channel looks just like an ordinary midi channel but somehow it is disabled. Perhaps it is meant to be disabled since its main purpose to to provide notation for its related RealChart.