[SoX-users] Silence - How to cut songs x seconds after audio drops below db value?

[Daniel J. <da...@gm...>]

Hi,

I'm looking for help on how to prepare the end of songs
using the SILENCE and PAD command.

The material is normal Top40 radio hits that sometimes
end with fade and sometimes with a hard ending. It
should be processed so that I can overlap each file by
6 seconds. Overlong fades should be cut, short hard
endings should be padded with silence.

I am trying to do this:

Step 1:
Add 6.0 seconds of silence to the end, so I always
have something to cut. (pad 0 6)

Step 2:
Locate 2 cutpoints

First cutpoint:
At the end of song, 1.00 second after the audio level has
dropped below -26db permanently

Second cutpoint:
At the end of song, 5.50 seconds after the audio level has
dropped below -16db permanently

Step 3:
Optimal solution
Cut audio at the later cutpoint of the two.
If SOX can't do that, cutting any cutpoint
would be OK (as I could run SoX twice with different
values and then select the best result later by
examining the file size)

My biggest problem is to cut audio x seconds after
the found cutpoint. Is this do-able in SoX ?