Re: Clicks in audio

[Kevin Harwell <kharwell@xxxxxxxxxx>]

Depending on the format you should be able to open the audio files in another program (like Audacity [1]) and verify if there are anomalies in the audio itself.

Other than that you could also try using an audio file that is known to not have issues. Try using one of the installed sound files found in Asterisk to see if those have similar symptoms.

Sometimes clicks and pops could be due to dropped packets. Try getting a pcap and see if any packets are being dropped between Asterisk and the phone.

[1] http://www.audacityteam.org/

On Mon, Oct 9, 2017 at 11:17 AM, Naftoli Gugenheim <naftoligug@xxxxxxxxx> wrote:

Hi, I have an IVR that uses FastAGI, currently running on asterisk 13 (via the cleardevice/docker-cert-asterisk13-ubuntu docker image).

The problem: In between playing audio files there is an audible click. I'm not sure if somehow the audio files themselves contain clicks and for some reason I don't notice when playing them without asterisk but over the phone they're magnified, if it's a codec issue, if I'm doing something the wrong way, or what. Any help is greatly appreciated!

Here is an illustration of what I mean, generated using a call recording app on my phone: https://drive.google.com/open?id=0B2SmgnDyV1aETDZrdnJBTU82RGc

Here are the files from the server that it uses: https://drive.google.com/open?id=0B2SmgnDyV1aEWGNJYy13OGZMTUU

I'm not sure why I have both .wav and .sln files.

Here is some information from the asterisk CLI:

ubuntu@chavrusa-main:~$ docker-compose exec asterisk asterisk -r

Asterisk certified/13.1-cert4, Copyright (C) 1999 - 2014, Digium, Inc. and others.

Created by Mark Spencer <markster@xxxxxxxxxx>

Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.

This is free software, with components licensed under the GNU General Public

License version 2 and other licenses; you are welcome to redistribute it under

certain conditions. Type 'core show license' for details.

=========================================================================

Connected to Asterisk certified/13.1-cert4 currently running on 9c5c45693e10 (pid = 17)

9c5c45693e10*CLI> core show version 

Asterisk certified/13.1-cert4 built by root @ 2dcc79fb8a1e on a x86_64 running Linux on 2016-03-03 08:25:13 UTC

9c5c45693e10*CLI> core show file formats 

Format     Name       Extensions          

------     ----       ----------          

siren7     siren7     siren7              

g719       g719       g719                

h264       h264       h264                

siren14    siren14    siren14             

h263       h263       h263                

gsm        gsm        gsm                 

gsm        wav49      WAV|wav49           

ilbc       iLBC       ilbc                

slin192    sln192     sln192              

slin96     sln96      sln96               

slin48     sln48      sln48               

slin44     sln44      sln44               

slin32     sln32      sln32               

slin24     sln24      sln24               

slin16     sln16      sln16               

slin12     sln12      sln12               

slin       sln        sln|raw             

slin16     wav16      wav16               

slin       wav        wav                 

g723       g723sf     g723|g723sf         

g729       g729       g729                

g726       g726-16    g726-16             

g726       g726-24    g726-24             

g726       g726-32    g726-32             

g726       g726-40    g726-40             

g722       g722       g722                

ulaw       au         au                  

alaw       alaw       alaw|al|alw         

ulaw       pcm        pcm|ulaw|ul|mu|ulw  

29 file formats registered.

9c5c45693e10*CLI> core show codecs audio 

Disclaimer: this command is for informational purposes only.

It does not indicate anything about your configuration.

      ID  TYPE     NAME DESCRIPTION

-----------------------------------------------------------------------------------

       5 audio     g726 (G.726 RFC3551)

       3 audio     alaw (G.711 a-law)

       1 audio     g723 (G.723.1)

      19 audio    speex (SpeeX)

      20 audio    speex (SpeeX 16khz)

      21 audio    speex (SpeeX 32khz)

      23 audio     g722 (G722)

       7 audio    adpcm (Dialogic ADPCM)

      24 audio   siren7 (ITU G.722.1 (Siren7, licensed from Polycom))

      27 audio     g719 (ITU G.719)

      18 audio     g729 (G.729A)

       8 audio     slin (16 bit Signed Linear PCM)

       9 audio     slin (16 bit Signed Linear PCM (12kHz))

      10 audio     slin (16 bit Signed Linear PCM (16kHz))

      11 audio     slin (16 bit Signed Linear PCM (24kHz))

      12 audio     slin (16 bit Signed Linear PCM (32kHz))

      13 audio     slin (16 bit Signed Linear PCM (44kHz))

      14 audio     slin (16 bit Signed Linear PCM (48kHz))

      15 audio     slin (16 bit Signed Linear PCM (96kHz))

      16 audio     slin (16 bit Signed Linear PCM (192kHz))

       2 audio     ulaw (G.711 u-law)

      17 audio    lpc10 (LPC10)

      26 audio  testlaw (G.711 test-law)

      39 audio     none (<Null> codec)

      25 audio  siren14 (ITU G.722.1 Annex C, (Siren14, licensed from Polycom))

       6 audio g726aal2 (G.726 AAL2)

       4 audio      gsm (GSM)

      22 audio     ilbc (iLBC)

      28 audio     opus (Opus Codec)

_______________________________________________
asterisk-app-dev mailing list
asterisk-app-dev@lists.digium.com
http://lists.digium.com/cgi-bin/mailman/listinfo/asterisk-app-dev

--

Kevin Harwell
Digium, Inc. | Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at: http://digium.com & http://asterisk.org

_______________________________________________
asterisk-app-dev mailing list
asterisk-app-dev@xxxxxxxxxxxxxxxx
http://lists.digium.com/cgi-bin/mailman/listinfo/asterisk-app-dev