[quote=“mazzic”]Don’t know how much help you will get here. I believe these forums are meant for the asterisk source distributed from here. Not the modified ones over at AsteriskWin32. Its not that people wouldn’t want to help, I just don’t think there are many here that have experience with that version.
Besides from what I saw on the download it has been years since the code has been updated. Its also based on a retired version of asterisk (AsteriskWin32 0.66b build from Asterisk 22.214.171.124).[/quote]
I am not much experienced in Asterisk ( just testing IVR dial plans), but to my understanding any version of Asterisk for Linux can be ported to Windows , as
Cygwin Information and Installation
Linux-like environment for Windows making it possible to port software running on POSIX systems (such as Linux, BSD, and Unix systems) to Windows.
Testing Asterisk on my laptop running Vista or on a number of mobile devices like Nokia’s N900, is a nice experience
and excellent education tool.
So I don’t need any special help for Asterisk for Windows (asteriskwin32) as setting up, configuration for Linux (modules, audio ports, SIP softphone client registration, extensions.conf …) all work fine in Asterisk for Windows or mobile OS.
I just test Asterisk for Windows + X-Lite softphone client for Windows, installed on the same Vista laptop
and sound quality of audio files played by Asterisk via X-Lite SIP client is excellent.
Sound is played via sound card to headphone.
The only problem with Celliax audio port for Asterisk module, when enabled , acting as a port between Asterisk and sound card, is sound quality of audio files played by Asterisk via Celliax audio module to sound card - > headphone.
Sound quality is poor, sound is distorted, noised as below.
Please just open the following wav file and play it to see the problem
In the meantime I have contacted Giovanni, developer of Celliax,
Steve and David, developers of Oslec - echo canceller for Linux,
downloaded Audacity and Goldwave tools to record a number of test audio files ( one frequency peak signal)
and process audio employing build-in filters and audio spectrum analyzers.
I was suggested, my machine can be under powered, so sound sampling fails to be done in real-time.
So I plan to install Asterisk for Windows on another XP Windows machine and run more tests.
Giovanni, developer of excellent Celliax, advised me to await successor of Celliax , GSMopen, coming both for Linux and Linux, supporting FreeSwitch with mobile audio port ( GSM Gateway).
I am still looking for experts in Digital Signal Processing from Linkedin to discuss how DSP algorithm can
be modified to cure the problem with poor sound quality.
Please open the below wav file to play in Linux)
Asterisk Celliax audio recorded by Audiocity in .wav file format
Tell me what wav file formats are supported by Linux ( what bitrate, frequency, mono or stereo, one channel …)
as I recorded a number of test audio files to be played as MusicOnHold and can’t make Asterisk to play them.
Ok. I have listed Asterisk installed audio codecs with
show audio codes command
g723, gsm, ulaw, alaw, g726, adpcm, slin, lpc10 g729, speex, ilbc
but need more detailed specification on wav file format to be played by Asterisk.