Until 1 Nov 2013 LAN used to play this boarding and landing music
I used to fly LAN a lot and loved it.
On 1 Nov 2013 they swapped it for this one
I don't like version anywhere near as much. I also do not fly them very much any more. Perhaps it's related to their new music
Avianca used to play Tierra del Olvido by Carlos Vives as their boarding music when it was just Avianca in Colombia. Now it changed to a more international but still regional tune.
This is the closest I could find to the version that Avianca used to play