A nice collection of all available siren sounds in a NYPD police car can be found at the NY Times. The "Air Horn" sound going through a horn loudspeaker should give the typical horn sound of ambulances.
Entries tagged as audio
I recently found this table which lists different audio formats and the bitrates where you'd reach similar quality.
Instead of playing music through usual audio players, there is the possibility of using the mpd - a daemon which runs in the background and plays music.Continue reading "Music Player Daemon"