Base key

[Wlodzislaw]

It would be useful to link base key to particular voices; now I need to change it for some instruments, for example going from saxes to flutes.

[join]

The easiest (and IMHO best) way would be to configure your sound module to transpose directly there. The problem of doing it on the Sylphyo is that it's easy to forget you had this when you switch to another sound module, and it's a pain to change everything.