Thanks to all for your kind replies. It's re-assuring that Martin can't get f5-mute to work with ST's either.

Maybe PG could take a look at that for an update?

And thanks for the soft-piano suggestions.

Rachael, Have you tried Pianoteq 4 as Martin suggests? It's in a different league from Forte, I think - if twice the price (for just the cut down 'Stage' version).

Thanks again - Best - Andy