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[asterisk-users] Playing mp3-files – will it be OK?


 
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ichverstehe at gmail.com
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PostPosted: Thu Apr 24, 2008 10:50 am    Post subject: [asterisk-users] Playing mp3-files – will it be OK? Reply with quote

Hello

99% of all my users are calling from GSM phones, and my system
basically just plays some sound files back.

The PBX is connected to an ISDN-30 connection. Are there any modules
for playing MP3 files, so I can use them with commands like Play() and
Background()?

And will it have any effect on the quality?

Load issues should be a problem, the number of concurrent calls are pretty low.

Thanks
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noahisaacmiller at gma...
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PostPosted: Thu Apr 24, 2008 11:07 am    Post subject: [asterisk-users] Playing mp3-files – will it be OK? Reply with quote

Hi Harry -

Quote:
99% of all my users are calling from GSM phones, and my system
basically just plays some sound files back.

The PBX is connected to an ISDN-30 connection. Are there any modules
for playing MP3 files, so I can use them with commands like Play() and
Background()?

See asterisk-addons for the mp3 module.
Quote:
And will it have any effect on the quality?

The callers should hear the file at the codec-quality of the channel
they're connecting on. So for your ISDN callers, that's probably ulaw
or alaw, and for the internal phones, GSM.


- Noah
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davies147 at gmail.com
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PostPosted: Thu Apr 24, 2008 11:10 am    Post subject: [asterisk-users] Playing mp3-files – will it be OK? Reply with quote

2008/4/24 Jared Smith <jsmith at digium.com>:
Quote:
On Thu, 2008-04-24 at 17:50 +0200, harry wrote:
Quote:
The PBX is connected to an ISDN-30 connection. Are there any modules
for playing MP3 files, so I can use them with commands like Play() and
Background()?

If I were you, I'd transcode the files to alaw and play back the alaw
version, so that Asterisk doesn't have to transcode them for every call
(which is a waste of CPU cycles).

If you *really* want to use MP3 files, you'll need to load the
format_mp3 module from asterisk-addons package.

You will also need to take into account that the music will be GSM
compressed by a GSM mobile network, and that gives reasonably poor
results in must cases. Over ISDN, the results are excellent.

Regards,
Steve
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