Is it possible to specify Toast notification sound

Question

I understand that in Update 3 we can specify custom sounds. But is it possible to specify any different sounds before Update 3, other than the default chime? If so, how?

The following is the xml payload I'm sending to the phone

<?xml version="1.0" encoding="Windows-1252"?>
<wp:Notification xmlns:wp="WPNotification">
  <wp:Toast>
    <wp:Text1>WEATHER ALERT</wp:Text1>
    <wp:Text2>asdfasdf</wp:Text2>
    <wp:Param>/Page2.xaml?NavigatedFrom=Toast Notification</wp:Param>
  </wp:Toast>
  <wp:audio src="ms-winsoundevent:Notification.IM" loop="true" />
</wp:Notification>

but regardless of what sound I specify in the line

<wp:audio src="ms-winsoundevent:Notification.IM" loop="true" />

or

<wp:audio src="ms-winsoundevent:Notification.Looping.Alarm7" loop="true" />

it always plays the same sound.

Am I doing something wrong or is it just not possible?

Answer 1

Not possible. This feature was introduced with GDR 3. Reference:

Windows Phone 8 Update 3 (OS version number 8.0.10492) introduces the ability to provide a custom sound for toast notifications. http://msdn.microsoft.com/en-us/library/windowsphone/develop/jj662938%28v=vs.105%29.aspx#BKMK_gdr3