Thank you, Seegs108, for the "FFDShow" recommendation. I have downloaded and installed "FFDShow-Tryouts". I was looking for a program with which I could input a movie file, edit or correct audio features, and then output to a new, modified movie file (for streaming movies from my computer to my TV). "FFDShow" does not appear to be such a program, so I am not sure how to use it.
Is "FFDShow" intended to run in the background, and replace the codecs included in a video transcoding program with codecs customized in "FFDShow"? Or does "FFDShow" provide customized codecs only for Media Players? How can I use "FFDShow" to transcode, edit, or convert movie files on my computer HDD?