> > Damon Estep wrote: > > > > > What I can not decipher is what file name extension should be used, > > > should it be a .wav file encoded at 8k/8b/mono? Or are you telling > me > > > that it should be .ulaw > > > > What I listed were file name extensions as recognized by Asterisk's > > format modules and sox (and other tools). > > > > WAV at 8KHz 8-bit mono is _not_ the same thing as ulaw; WAV is not > > compressed (normally), so that would be 8 bits of dynamic range. ulaw > > and alaw are 8-bit compressed formats, with 13/14 bits of dynamic > range > > (this is all documented on the wiki too, I think). >
For others that may find this archived in the future! If using zaptel and g.711u you would want sound files saved in the ulaw format, so record at a higher quality, maybe 16bit, 8khz, mono WAV and the use sox to convert to ulaw Sox does not recognize .ulaw as a format so use .ul - both asterisk and sox recognize that extension # sox sound.wav sound.ul The quality, as Kevin mentioned, is far better than raw 8bit pcm. Having a set of files with the .ul extension present on the system will result in asterisk picking those files when the call is g.711u or zap. _______________________________________________ --Bandwidth and Colocation sponsored by Easynews.com -- Asterisk-Users mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
