[asterisk-app-dev] Clicks in audio

[Naftoli Gugenheim]

Hi, can anyone look into this, or at least give me some pointers?

On Mon, Oct 9, 2017 at 12:17 PM Naftoli Gugenheim <naftoligug at gmail.com>
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 at 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 at digium.com>
> 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)
>
>
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