[SoX-users] Mixing 2 audiofiles with fading!?

[<jon...@zo...>]

Hello,

I have 2 audiofiles one file with a voice.wav file for example 1 minute (this
time is variable). And one file with a Musicfile (for example 2 minutes).

I will create one file with soxmix with the following line
soxmix voice.wav musicfile.wav outputfile.wav

When i use this example the audiofile is 2 minutes long after mixing. But is it
possible to create a fadeout after the time of file one? Because when i add: 
fade 0 60 3 this works. But i should know what the time is of audiofile 1, and
i don't no this always, because it will generate automatic...

Is it possible to create a mix from the 2 audiofiles and end this file when the
voice.wav is over, and make this file not longer!?