Hello!  There certainly are some tricks of the arranging trade,
especially when it comes to lesser-keyed scales -- the 20er perhaps
being the most wide-spread one.

Harald Mueller mentioned some standard tricks such as "omitting the
missing note," "using the other notes in the chord," "octave jumping,"
and "using the nearest natural note."

Now, Harald, I would treat the first bars of "Sobre las Olas" (as it
is called in its native Spanish) differently.  To be frank, "using the
nearest natural note" sounds bad.

There's a trick which I would like to call "diverting the listener's
attention", and with a famous piece such as "Over The Waves", the
listener's mind will automatically put in that missing note in its
proper place!

Please refer to the attached MIDI file which I hope that Robbie will
put on the "Sounds" page!

Best regards
Christofer Noering
Stockholm

 [ It will soon be at http://mmd.foxtail.com/Sounds/  -- Robbie