On Sep 24 07:06:23, erich@xxxxxxxxxx wrote:
> Hi Bob,
>
> can you post the command you used to generate that file?
> It is indeed not "silent" at the beginning:
>
> >sox sound77.wav -n trim 0 9 stats
>
> DC offset -0.000002
> Min level -0.007812
> Max level 0.007812
> Pk lev dB -42.14
> RMS lev dB -48.17
> RMS Pk dB -47.83
> RMS Tr dB -48.64
> Crest factor 2.00
> Flat factor 2.17
> Pk count 99.0k
> Bit-depth 1/8
> Num samples 397k
> Length s 9.000
> Scale max 1.000000
> Window s 0.050
>
> However, if I do a pad:
>
> >sox sound77.wav test.wav pad 10
The manpage says
pad { length[@position(=)] }
[...]
position is optional for the first and last lengths specified
and if omitted correspond to the beginning and the end of
the audio respectively.
So if I am reading this right, you are padding
with 10 seconds of silence at the beginning.
Then in particular the first 9 seconds is silence:
> and analyze the result, it's silent:
>
> > sox test.wav -n trim 0 9 stats
> DC offset 0.000000
> Min level 0.000000
> Max level 0.000000
> Pk lev dB -inf
> RMS lev dB -inf
> RMS Pk dB -inf
> RMS Tr dB -inf
> Crest factor 1.00
> Flat factor 111.97
> Pk count 794k
> Bit-depth 0/0
> Num samples 397k
> Length s 9.000
> Scale max 1.000000
> Window s 0.050
Jan
------------------------------------------------------------------------------
_______________________________________________
Sox-users mailing list
Sox-users@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/sox-users
