Hello,  Maybe pad main_file.wav with 1.5 seconds first separately. Then
`soxi -D main_file.wav` outputs what you need?
M0
PS I am not absolutely sure if you want to mix three files (as "mix" in sox
manual). If yes, then pad (as "pad" in sox manual) between two of them does
not make much sense? padding makes sense in concatenation context not in
mixing context?

On Sat, Apr 18, 2020 at 8:12 AM jungle boogie <jungleboogie0@gmail.com>
wrote:

> Hi All,
>
> I'm using SoX v14.4.2 and would like help mixing three files, with
> silence in between two of them.
>
> Problem I want to solve:
> Mix three files with, with the longest being shorten to a specific file.
> I also want a 1.5 second pad between short_track.wav and main_file.wav
>
> What I've tried:
> sox -m main_file.wav long_track.wav -p pad 1.5 0 | sox - -m
> short_track.wav -t wavpcm out.wav trim 0 0 `soxi -D main_file.wav`
>
> Problem is that the file cuts off about 1.5 seconds too quick, which is
> how long my pad is.
>
>
> I've also tried creating a blank file:
> sox -n -r 16000 -b 16 -c 1 silence.wav trim 0.0 1.5
>
> Then combining it:
> sox short_track.wav silence.wav main_file.wav long_track.wav out.wav
> trim 0 `soxi -D main_file.wav`
>
> But you seasoned sox experts already know this means log_track.wav isn't
> used at all. This also cuts off about the last 1.5 seconds of the
> out.wav file as well.
>
> So is it possible to combine these files and trim to the main file?
>
> Any pointers would be greatly appreciated!
>
>
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