Oh boy, this is really embarrassing for me and I am sorry for having brought that stupid issue up - looks like I made a fool of myself.

This is how it happened:

I hadn’t heard of a combined MIDI / audio track before either, but since I’m still new to all this and RB surprises me (positively) every day, I fell into the trap.

First of all, I wouldn’t have expected that RB suggests the source MIDI track as default destination track and thus overwrite the MIDI data for good without giving any warning.

Secondly, I converted the MIDI track using a new VST instrument. The result was a horzontally splt track with two completely different parts: The lower one was clearly a wave while the upper one showed something that I (being blind as a mole anyway) took as dots which I interpreted as my MIDI data. Now I know that it must have been just a stereo track with a high gain in the lower channel and almost no gain in the upper one. When converting MIDI into audio the resulting stereo channels very often have different gains, but never to that extent - still don’t know how that could happen...

Well, how stupid can you get... sorry again.

Stefan