[asterisk-users] Voicemail- Recorded Mesage Low Volume

[Daniel Hazelbaker]

> Hi Daniel,
>
> I'm intrigued by this and wanted to try it out - but I'm wondering how
> you get Asterisk to call sox at all during Voicemail()? Our server
> doesn't even have sox installed, so I'm not sure how to go about
> tricking Asterisk into running a different one.

To do anything useful you would have to get sox installed on your  
server.  But to get asterisk to run a different/fake sox, just install  
whatever you want to run as /usr/local/bin/sox and then edit your  
safe_asterisk script as I mentioned below.  Asterisk runs the program  
'sox' using the first match in your $PATH, so by updating the $PATH  
before asterisk runs you can direct it to run a different sox  
program.  Be aware that this could pose a security issue as some  
systems allow regular users to modify /usr/local/bin.  So people could  
install other programs that asterisk runs into that directory as well  
to get elevated privileges.  For me it is not a concern as the machine  
is used only for Asterisk and only accessed by our IT department.

Daniel

> CP
>
> Daniel Hazelbaker wrote:
>> On Apr 1, 2008, at 5:22 PM, asterisk-users-request at lists.digium.com
>> wrote:
>>
>>> Can the volume of the recorded voice mail message be changed?  If
>>> so, what I am doing wrong?  Any input would be greatly appreciated.
>>> Thanks.
>>
>> I had a similar problem in our setup where we e-mail the recorded
>> messages to e-mail retrieval.  But this also helps standard phone
>> retrieval too.  What I did was edit the /usr/sbin/safe_asterisk  
>> script
>> and add:
>>
>> PATH="/usr/local/bin:$PATH"
>>
>> At the top of the script. This would let me override the default sox
>> implementation that Asterisk uses.  Then I loaded in a script (called
>> sox) that would compress and normalize the recorded audio (It
>> compresses to deal with the spikes of the noise of the handset being
>> hung up, etc.). It works pretty well for us and makes the volume
>> pretty good so we don't have to crank up the volume on our computers
>> or phones to listen to voicemail messages.  And we can't adjust the
>> rxgain as it is already a good volume for normal calls.
>>
>> Daniel
>>
>> --CUT--
>> #!/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
>> --CUT--
>>
>>
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