ulaw/g729/ asterisk converter gopi baskar 25 Feb, 2012 1 mp3 / wav files to g729 or ulaw or alaw or gsm converterFree converter to convert mp3 or wav files to g729 , ulaw , alaw ,gsm audio formats.1.Prerequistics Asterisk server ( asterisk installation guide)ease audio converter ( link)winscp (link) 2. Assume you have working asterisk server and ease audio converter installed in your windows 3. Convert your audio file to wave format which suitable for the asteirsk ie:16bit Mono 8k PCM wav audio4. Using Ease audio converter you convert any audio format file to the above said format.open the ease audio conveter click the settings ==>output formats ==>WAVquality=Custom quality ; Frequency(Hz)=8000 ; Channels = mono ;outputformat= 16bit wav(PCM)press oknow upload your audio files and select output format to wav and press the start button.the output file will be in the 16bit Mono 8k pcm wav , which suitable to use in asterisk 5. Now upload your converted audio file to the asterisk /var/lib/asterisk/sounds directory using the winscp tool6. Now using putty log in to the asterisk server via ssh7. go to the asterisk cli command by typing asteirsk -vvvvr8 . In cli command type the below commands to convert you audio file to g729 or ulaw or alaw or gsm\For G729 file convert youraudio.wav youraudio.g729For ulaw file convert youraudio.wav youraudio.ulawfor alaw file convert youraudio.wav youraudio.alawfor gsm file convert youraudio.wav youraudio.gsm9. the converted file will be in the /var/lib/asterisk/sounds folder/directory.