= Checking if Audio is Playing Properly by Playing a WAV File =

== First Check, Playing WAV File with pjsua ==
An easy way to check if speaker is functioning properly is by using '''pjsua''' to play a WAV file to the speaker, with these easy steps:

 1. Find any WAV file with the following specification:
   * any clock rate
   * '''mono''' (not stereo)
   * 16bit, PCM sample
 1. Run pjsua with the file:
{{{
  $ ./pjsua --play-file THEFILE.WAV
}}}
 1. Check that the file is registered to the bridge:
{{{
>>> cl
Conference ports:
Port #00[16KHz/10ms] Primary Sound Capture Driver  transmitting to:
Port #01[16KHz/10ms]          THEFILE.WAV  transmitting to:
}}}
 1. Play the file to the speaker:
{{{
>>> cc 1 0
Success
}}}
 1. Done. You should hear the file played to the speaker.

If you couldn't hear the file played properly to the speaker, then follow the next step.

[[BR]]

== If First Check Fails, try Playing the WAV File with playfile sample ==

If the file is '''not''' playing properly with pjsua, then try playing the file with '''{{{playfile}}}''' sample. The {{{playfile}}} sample binary should be put in {{{pjsip-apps/bin/samples}}} directory after the samples project is successfully built.

To play a WAV file with {{{playfile}}} sample:
{{{
 $ ./playfile THEFILE.WAV
}}}

The difference between pjsua and playfile program is the lack of conference bridge in playfile.


== Troubleshooting ==

=== No audio is heard with both pjsua and playfile ===

Probably it's because:
 * the speaker is not working properly
 * the level is set too low
 * the WAV file contains blank recording
 * or something else..