So I broke down and bought a new audio usb interface - Focusrite Scarlett usb 4i4. Installed it. All audio functions work fine.
Loaded the midi drivers Focusrite midi drivers for input and output into PT. Juno Di keyboard/synth L/R output 1/4” cables plugged into Focusrite unit line inputs.
I can see keypresses from Juno on Power Tracks screen but no sound can be heard, and the input monitors on Power Tracks do not show any activity.
Advise appreciated!
Bernie