PROBLEM SOLVED by Presonus Tech Support. At one point or another I was exploring the Control Link function and recorded a Midi Learn for the 4 cc faders on The Sparrow. This apparently diverts the data to the functions I learned so the Synchron player would not get them. Hats off to Lawrence at Presonus for a quick response and a fast solution. :)
Yesterday I used my Sparrow 4 Fader midi controller to add Expression to my midi tracks in Studio One 6. I programmed the slider 2 channel for cc11 (expression) on the Synchron Player and it worked great.
Today I called up the same project and the Synchron Player doesnt respond. I checked the Studio one Midi Monitor and there is good data flow. On the track I have selected The Sparrow as the midi controller source. And the the Preferences/ External Midi Controller file for the Sparrow is still there.
The connection to the fader is good. Studio One indicates it is getting signal when I move the slider, but the Synchron Player just sits there and doesnt move. The LEARN function doesnt work either. Ive tried VST 3 (my usual) and VST 2 with no difference.
I have successfully used the fade with SP yesterday. FWIW Im on a Mac Studio running Rosetta (with no hitches) for weeks.
HELP!!!