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Recording Audio for Asterisk | Redial
http://www.itp-redial.com/class/weekly-notes/week2-notes/recording-audio-for-asterisk#:~:text=By%20default%20Asterisk%20prefers%20audio%20files%20that%20are,and%20you%20can%E2%80%99t%20be%20sure%20of%20the%20results.
Asterisk 10 Codecs and Audio Formats - Asterisk Project ...
https://wiki.asterisk.org/wiki/display/AST/Asterisk+10+Codecs+and+Audio+Formats
CELT Pass-through Support. Asterisk 10 adds pass-through support for the CELT codec. CELT provides low-delay transmission of high-quality audio. Unlike many other codecs that are focused on the transmission of human speech only, CELT is suitable for the transmission of both speech and audio, e.g. music.
Asterisk Audio and Video Capabilities - Asterisk Project ...
https://wiki.asterisk.org/wiki/display/AST/Asterisk+Audio+and+Video+Capabilities
Asterisk supports a variety of audio and video media. Asterisk provides CODEC modules to facilitate encoding and decoding of audio streams. Additionally file format modules are provided to handle writing to and reading from the file-system. The tables on this page describe what capabilities Asterisk supports and specific details for each format.
Recording Audio for Asterisk | Redial
http://www.itp-redial.com/class/weekly-notes/week2-notes/recording-audio-for-asterisk
By default Asterisk prefers audio files that are encoded with the GSM or ULAW codec. This is not to say that Asterisk can’t deal with WAV or other types of files (it can in some cases), but for transmission over VoIP connections those formats will have to be converted on the fly which uses processing power and you can’t be sure of the results.
Opus Codec for Asterisk - GitHub
https://github.com/wazo-platform/wazo-codec-opus-open-source
Opus is the default audio codec in WebRTC. WebRTC is available in Asterisk via SIP over WebSockets (WSS). Nevertheless, Opus can be used for other transports (UDP, TCP, TLS) as well. Opus supersedes previous codecs like CELT and SiLK.
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