GoldWave Inc.

I have 20 files, each 1 – 5 minutes long. I would like to combine them, one after another, into one long file. I know how to do this manually by pasting one into another repeatedly; but wonder—is there a way to do this all at once?

There's a "file merge" function in Goldwave. I've used it. Don't know what menu it's listed in; you could check the manual.