If the audio in question is covered by a copyright, you should obtain a license for that audio use.

Doing otherwise is an infraction of the law.

That's as simple or complicated as it gets. It doesn't matter if you use 1 second of the audio. It's covered by a copyright.

There was a big issue with musicians using samples some time back and all libraries that I have music in, require that you either have license or own 100% of the music. And if you use sampled music, you must disclose that upfront.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.