[asterisk-users] Normalize Voicemail Volume?

[Daniel Hazelbaker]

I use the following script to perform compression and normalization on  
e-mailed voicemails.  I put the script in as /usr/local/bin/sox and  
pre-pend /usr/local/bin to the PATH before asterisk runs in the  
startup script.

The values for the compressor are not scientific, I monkeyed with them  
until I thought it sounded like a good volume, YMMV.

Daniel

#!/bin/sh
#
# $1 = -v
# $2 = number
# $3 = inFile
# $4 = outFile
#
REALSOX="/usr/bin/sox"

if [ "$1" != "-v" ]; then
   $REALSOX $*
   exit $?
fi

INFILE="$3"
OUTFILE="$4"

#
# Perform the gain adjustment.
#
$REALSOX "$INFILE" "$OUTFILE" compand 0.1,0.3  
-60,-60,-30,-15,-20,-12,-4,-8,-2,-7 0 0 0.2


On Jun 26, 2009, at 7:44 AM, Adam Moffett wrote:

> We generally get our voicemails emailed to us from asterisk, but some
> people's messages are extraordinarily loud or quiet.  I don't suppose
> there is any feature to even out the volume level is there?
>
>
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