Programmatically change phone ( symbian ) speaker volume

Question

I have been developing a radio application for Symbian phones ( 2nd , 3rd and 5th editions ). It seems to me that changing the volume of the phone speaker programmatically is not straightforward.

Please help me in understanding how the phone volume could be controlled in Symbian.

Is there an API for controlling the phone volume?

I have looked at CAknVolumeControl and my impression is that its just a UI control depicting volume levels for the user to set. I think setting the phone volume to the level the user selects requires doing something more.

Please clarify

Answer 1

You change the volume only once you've prepared the C++ object that will actually play a sound.

CMdaAudioPlayerUtility::SetVolume()

and

CMdaAudioPlayerUtility::MaxVolume()

are what you're looking for, I'd venture.

Answer 2

In the S60 SDK Extension Plugins there is the "TwoCenRepKeysToControl PhoneVolume API" that publishes two central repository keys used to control phone volume. I'm not sure will they affect the volume outside calls.

http://www.forum.nokia.com/Tools_Docs_and_Code/Tools/Extensions/S60_Extensions_Plugins/Features.xhtml