Another way is to go to the end of your audio clip in the timeline and right click on the audio jump channel and choose add key frame. Now set that key frame to cycle back to the beginning of your clip. Your audio clip should keep looping now.
Import the audio.
Move to frame one or any frame, it does not matter.
Click on the key frame on frame 0 that says 'audio jump.'
Click on copy, click on paste.
Drag that new key frame to the end of the audio in the time line.
Right click on that new key frame and cycle back to frame 1.