Some business sites use video / audio clips of their stuff in action, presented via a text link to the clip.
As for me, I don't appreciate being tag-teamed with solicitation efforts, however, if the files/text are specifically made for presentation / information and not because someone is trying to make their sale, that I find acceptable.
So don't tell me the car has plenty of power, but do feel free to tell me I can keep the pedal to the floor until the rpm needle pegs the redline governor, and would I like to take a test-drive so I can see what it feels like...
Now if the sound file only garbles back what I can read in the text, that is an insult to my intelligence. However, if the sound file is a recording of the engine at full throttle (which is something you can not emulate in print), then you might have my attention.
As far as whether or not I will remember it, if it is as good as it looks and sounds, I will RUN out and BUY it before I forget!