For some reason, I only quite recently noticed the potential of a new Dorico 3.5 Expression Map feature which could be a major time saver in the way I work with dynamics, rather as with the Note Length feature for durations. The Secondary Dynamic controller has now acquired parameters enabling you to calibrate it to a restricted range based on the primary. This “under-trumpeted” feature is potentially useful for any library which allows dual control of dynamics with one generally being tone/expression and the other pure volume. It’s an absolute godsend for the VSL Synchron libraries which do not allow very quiet dynamics in many situations. With the primary using VelXF as recommended, the secondary controller which should be CC11 (the inappropriately named Expression) can be then set to a restricted range which then scales appropriately in relation to the primary and seems to work admirably. Something around 60-70 to 115-120 could be a good starting point for testing to individual taste.
The only little issue I’ve found (well so far is that when clicking on a note, the secondary dynamic matches the primary rather than scaling to it which makes the quietest dynamics almost inaudible. I assume this is as designed as it appears consistent. Surely it would be better to hear the same level as in the actual playback as normally happens with only a single dynamic controller if this were possible to implement?