A cache for music lovers!
The cache is not at the listed coordinates

You will find the cache at
S 33° 49.PIANO ... E 151° 11.FLUTE
...
For PIANO ---- take a Posthorn, add a Joke and take away the Don
For FLUTE ---- take Colloredo, add Lucio Silla and then top it up with Something All The Ladies Do
The cache is small and camouflaged. It will not hold swaps or trackables. BYOP.
You can check your answers for this puzzle on GeoChecker.com.

*** FTF Honours go to akkatracker and Baby J Man. Congratulations! ***