Sends audio file on channel.
Send the given file, allowing playback to be interrupted by the given digits, if any. Returns
0 if playback completes without a digit being pressed, or the ASCII numerical value of the digit if one was pressed, or
-1 on error or if the channel was disconnected.
filename- File name to play. The file extension must not be included in the filename.
escape_digits- Use double quotes for the digits if you wish none to be permitted.
sample offset- If sample offset is provided then the audio will seek to sample offset before play starts.
This documentation was imported from Asterisk Version SVN-branch-10-r370277