On Passport to Dreams Old and New, the world's greatest Disney themepark critic Foxxfur traces the history of the Jungle Boat Cruise queue-loop, makes some shrewd guesses about where the Imagineers found their material, and (most importantly), what the addition of the music did to the overall design story of an iconic ride.
The WDI-created loop is widely available and runs 47:30. In order to create the loop, WDI had to get very creative in editing the music. Certain songs had slow sections which had to be removed, while others had their vocal sections entirely omitted. The Cole Porter song "I Get A Kick Out Of You" had an entire verse dropped to exclude a reference to cocaine. As a result, the entire AWOL loop as it appears in park, with narration and breaks in the music for announcements every few minutes, has a shorter run time than all of the selected pieces of music played together. Certain songs were compressed, others extended. It's a very elaborate effort.
Since the "final WDI edit" is widely available, here are the songs as they appeared on the original 78 disc releases, unrestored. The "WDI mix" versions of these songs often includes a bit of ambient reverb, which changes the sound of the some of the songs considerably, and made identifying the Dick Powell track particularly challenging.