Re: volume extremely low when combining many files

[Bob S <bsabiston@gmail.com>]

> On Sep 24, 2016, at 12:06 AM, Erich Eckner <erich@eckner.net> 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
> 
> 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
> 
> Something else seems to be wrong.
> 
> Cheers, Erich

Hey Erich,

	Thanks again for the reply.  Here is the call I use to generate file 92 for example:

sox -V   -t raw -r 11025 -e signed -b 8 -c 1 sound0000  -r 44100 sound92.wav vol 1 speed 0.93636363744736 pad 12.966666666667 10.966666666667 trim 0 13.033333333333

Here’s the result:
https://dl.dropboxusercontent.com/u/4215526/sound92.wav

I don’t know if it could be part of the problem, but here is the source effect file “sound0000”, which is not a wav but just raw samples:
https://dl.dropboxusercontent.com/u/4215526/sound0000


Bob








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