There are 2 audio files (mp3 or wav). The first file has the voice of me, the second is the voice of my friend. Each of them has 10 seconds . I want to combine them to get one file , which should also have a duration of 10 seconds .
What are the tools or utilities that I should use to solve this problem?
UPDATE: I used lame.exe, but concatenated them and created a file lasting 20 seconds.
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