I'm working on a project using some loops of audio I have created. The looped bits of audio themselves are also a series of loops. So one audio file, for instance, consists of eight loops of a passage of sound. If I listen to the audio file in an audio program in repeat mode, it loops endlessly and seamslessly.

However, when I place two chunks of this loop on the timeline abutted right next to each other and then render that section, there is a noticeable "jag" in the sound when the movie passes from one chunk of loop to the next. Subtle, but noticeable.

This is not in preview, I'm talking about, but viewing the rendered MP4.

I need seamless audio jump cuts.

EDIT

Never mind. User error. I can see now that I had some DC offset at the beginning and ending of my loop, which casued the click.