Had a chance to build up few test songs with the Midi Recorder, and would like to use the Mixer to adjust the settings of each song's component tracks once they have been laid down. Changes made in the Mixer work fine in real-time, controller-style, but these changes only last till the song stops playing or is restarted.  When playing, say, in a loop, all tweaked settings are reset to their initial values as soon as the first bar is replayed.  Changes are not propagated to the recording itself,