MIDI Output to Yamaha CLP 775 - How to Map MS Sounds to actual CLP Piano Instrument Options?

1. Connect Yamaha CLP to Mac (Catalina) via Bluetooth MIDI
2. Set MS Output to BT MIDI
3. Select MIDI Sound = "Grand Piano"
4. Play Score - this works fine
5. Change MIDI Sound = "Violin"
6. Play Score - Still plays a piano

Trial and error shows that some "Sounds" play (e.g. "Church Organ" is an organ sound - but usually not as expected. So the CLP Piano has a set of Sounds it can play but these do not map to the MIDI Instruments listed in Sounds in MS and I can't work out what the cross mapping is.

I am not sure what MIDI Number is output for each "Sound" in the list (is there a way to find out - is it 1-128 in order?) Complicated by the fact that the Instruments sounds listed in the CLP MIDI Manual are "obscure" to say the least (attached). I suspect I need a Soundfont, but this is way beyond me.

I basically just want to be able to select Sound "Violin" (or a string sound) rather than "Piano". But short of trying each Sound in turn and hoping I recognise it, I seem to be stuck.

Any help appreciated.