[asterisk-users] best format for playback/generation

[Gareth Blades]

The best format would be in whatever format asterisk is sending the 
final audio out in. Even if you store it in the highest quality asterisk 
may have to transcode it on the fly so its best to store it in an 
already transcoded format to reduce the cpu load.
For dahdi you would want to use the native .sln format. For sip use 
whatever coded you use over the sip connection.

Danny Nicholas wrote:
> 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
>