[asterisk-users] best format for playback/generation

[Danny Nicholas]

Greetings fellow listers,

                                  I have an application where I have
approximately 300 files that I playback individually or in blocks to
simulate "text-to-speech" in a "less mechanical" voice than normal Allison
files provide.  These files are presently in GSM format and sound pretty
good when I play them on my computer speakers or on my in-house Polycom
501's over SIP connections.  The "problem" I have is that the intended use
of the application is going to be over SIP/DAHDI trunks that will connect to
VM's over IAX trunks.  What is your best suggestion for maintaining the
quality of the audio as much as possible?

 

Best Case presently - SIP phone in-house to IAX

Worst Case presently - Cell phone calls Asterisk 1 on TDM400P which connects
to VM Asterisk 2 via IAX.

 

Asterisk version is 1.4.30

 

Thanks in Advance

Danny Nicholas

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