Ten Pieces - Horn Concerto No. 4 (3rd Movement)

Vivace is related to 'vivid', i.e. with plenty of life to it. It's hard to hear this piece and not buck up and smile!

These enable the player to switch-in extra lengths of tubing so that all the notes can be played. Previously, the single un-valved tube could only produce notes within its harmonic series (not the same thing as a full scale; please look up this technicality elsewhere if interested, since it's important)

Including all the 'diversions' this is the correct length. Answer 3 refers to the typical total length of the digestive tract within a fullgrown human body ~ not to the tubing in a horn!

This is originally a French term (from their root-word bouche = 'mouth')

The horn (and its single-tube cousins, the bugle and post-horn) were originally used as outdoor signals over long distances. It was Papa Haydn who had the master idea of bringing the horns into his developing orchestra on the Esterhazy estate, and nowadays the symphony orchestra would be the poorer without the warmth of a group of them in the middle register of the brass section

'Cadence' means the musical feature where one chord leads into another as the harmonies move on through a piece, and at the end. If you stop a moment to consider what goes on in Happy Birthday to You, each time you sing 'to you' you can probably hear others singing or playing along with you, and together they reach ~ as it were ~ the end of a musical phrase or sentence (or idea). The first 'to you' sounds and feels different from the second and final ones (which should sound alike): and 'where the music's going' at these points is, basically, a matter of cadences. In a concerto movement, what one might expect to be a final cadence is suspended in mid-air while the soloist goes off on a (usually fairly wild and virtuosic) flight of musical fancy all on their own

Gilbert & Sullivan (Ans.3) were each dead by 50-odd years when this version was written. Flanders & Swann entitled their song Ill Wind and it should be readily available online / by CD etc

If you listen carefully you will still fail to hear any flutes, clarinets or trumpets at any point

This time pattern is associated with riding, galloping, cavalry marches (like Sousa's Liberty Bell and many others) and the old 'jig' dance ~ to which one could, at very least, easily skip (think of BBC Radio 4's Archers signature tune, which began life in the style of a maypole dance)

We hear plenty of the tune as it goes away and comes back again every couple of minutes. It would be a shame to waste such a good one!