One of most famous song of A. C.Jobim has been composed mostly using only one note. As the guitar plays chords you get and illusion of melody. 
ONE NOTE SAMBA
This is just a little samba
Built upon a single note
Other notes are bound to follow
But the root is still that note
Now this new note is the consequence
Of the one we've just been through
As I'm bound to be

The unavoidable consequence of you
There's so many people
Who can talk and talk, and talk
And just say nothing
Or nearly nothing
I have used up all the scale
I know and at the end
I've come to nothing
I mean nothing

So I come back to my first note
As I come back to you
I will pour into that one note
All the love I feel for you
Any one who wants the whole show
Re mi fa so la ci do
He will find himself with no show
Better play the note you know

Samba de uma nota so- One Note Samba , comp. A.C.Jobim

Sandú Brus- Songs from my guitar and my heart