[Asterisk-Users] Horrible BUZZZZ noise when sounds/music play on SIP phone?

[Andrei (MPI)]

David Boyd wrote:

>On Wed, 2004-11-24 at 04:14, Mike Dent wrote:
>  
>
>>Hi,
>>I've recently set Asterisk up, 1.0.2 version. With 1 x X100P card and
>>1 SIP phone.
>>I've noticed some horrible buzz/rasping type of sounds! These seem to occur when
>>* is trying to play back some audio or sound to me?
>>
>>E.g. If I have an exten rule which plays one of the music on hold
>>files when I dial 800 lets say,
>>I get a really loud buzz for about 2 seconds and then the music plays.
>>
>>E.g. 2. If I dial 500 to connect to Digium, as the call is connecting
>>I get the same loud
>>buzz noise for 0.5 seconds or so.
>>
>>Not sure where this is coming from? I did a search on the wiki for
>>buzz/hum/rasp but could
>>not find anything.
>>
>>Thanks
>>
>>Mike
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>>
>
>Sound like an IRQ issue. Check to see if you are sharing an interrupt on
>your X100P card, take a peek with " cat /proc/interrupts (on linux at
>least) :)  
>  
>

..and stop running X (x-windows) on your Asterisk box. :)