[asterisk-users] 30 mins GSM file

[Vinícius Fontes]

----- "Jeff LaCoursiere" <jeff at jeff.net> escreveu:

> On Thu, 4 Mar 2010, Steve Howes wrote:
> 
> >
> > On 4 Mar 2010, at 23:11, Steve Edwards wrote:
> >> On Thu, 4 Mar 2010, Steve Edwards wrote:
> >>> On Fri, 5 Mar 2010, David @ULC wrote:
> >>>
> >>>> I need to create 30 mins of GSM file for Asterisk .
> >>>>
> >>>> Silent  / Blank file.
> >>>>
> >>>> Whats the best way to create it ?
> >>>
> >>> Record yourself thinking of the solution for 1/2 of an hour.
> >>
> >> Use sox to concatenate 6.9 copies of John Cage's 4'33"
> >
> > Get permission first..
> >
> > S
> >
> 
> Considering that was a 1950's era composition, perhaps the copyright
> has 
> already expired?
> 
> j
> 

Haha epic thread.
Now seriously.

I'm not sure why you want to make a 30-minute gsm-encoded silent audio file, but I'm pretty sure there's a better way to accomplish what you want than doing that. If you explain us what you're trying to do, maybe we can help even more.

Anyway... Audacity can easily create a blank file of any lenght. Export it as WAV and convert it to GSM using Asterisk with the "file convert" CLI command. Make sure you create the file with 8000khz sampling rate, 16-bit resolution and mono, otherwise Asterisk won't be able to play it. Well, but there's no audio on the file either... *head asplodes*