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Asterisk Voicemail Transcription via IBM Cloud Speech-to-Text AP…

    https://jrklein.com/2015/08/17/asterisk-voicemail-transcription-via-ibm-bluemix-speech-to-text-api/#:~:text=Note%3A%20You%20do%20NOT%20need%20to%20install%20the,IBM%20can%20use%20the%20original%20%E2%80%9C.wav%E2%80%9D%20audio%20file.
    none

Recommendation for voicemail format? - Asterisk Support ...

    https://community.asterisk.org/t/recommendation-for-voicemail-format/83592
    MP3 is a poor engineering choice, at least with default parameters, as it is over-engineered fro the actual quality of phone audio..wav with a gsm payload (= wav49 or WAV in Asterisk), will produce the smallest files for a universally supported format.

Asterisk Audio and Video Capabilities - Asterisk Project ...

    https://wiki.asterisk.org/wiki/display/AST/Asterisk+Audio+and+Video+Capabilities
    In the general section of voicemail.conf you can set the formats used when writing voicemail to the file-system. We set the option "format" to a string of file format names. The value "wav49" represents GSM in a WAV|wav49 container. The value "wav" represents SLIN in a wav container. The value "gsm" represents GSM in straight gsm format.

Setting up voicemail in Asterisk - IT Blog

    https://ixnfo.com/en/setting-up-voicemail-in-asterisk.html
    Next, configure the configuration of voice mail in the file /etc/asterisk/voicemail.conf: [general] ; Format of audio files format=wav49|gsm|wav ; From whom to send letters with notifications [email protected] ; Whether to attach to an audio file attach=yes ; The maximum number of messages (standard 100, maximum 9999) …

Asterisk Sound Files 101! ⋆ Sangoma

    https://www.sangoma.com/articles/Asterisk-sound-files-101/
    RM: While .wav for mat files can contain data at a variety of sampling rates and bit depths, Asterisk can read only two kinds of these files: Microsoft WAV format at 8000 hz signed linear (with a lowercase .wav extension) or WAV-GSM, also called wav49, with an …

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