diff -r 43e37759235e -r 51a74ef9ed63 Symbian3/SDK/Source/GUID-12A754EE-7D90-56C8-BDA7-3293F34BE456.dita --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Symbian3/SDK/Source/GUID-12A754EE-7D90-56C8-BDA7-3293F34BE456.dita Wed Mar 31 11:11:55 2010 +0100 @@ -0,0 +1,14 @@ + + + + + +Playing a Tone SequenceThis tutorial describes how to play a sequence of tones.

You have to configure DevSound for playing a tone sequence.

The following settings can be configured before or during tone play:

  • To change the volume of the audio device to a specific value, use the CMMFDevSound::SetVolume() function. The volume can be set to any value from 0 to CMMFDevSound::MaxVolume().

    To define a period over which the volume rises from 0 to the normal volume level, use the CMMFDevSound::SetVolumeRamp() function.

    Note: The CMMFDevSound::SetVolumeRamp() function is only available during tone play.

  • To set the speaker balance, use the CMMFDevSound::SetPlayBalanceL() function. This function has two parameters:

    • aLeftPercentage - the left speaker volume percentage.

    • aRightPercentage - the right speaker volume percentage.

  • To set the priority setting for this instance of DevSound to access the audio device, use the CMMFDevSound::SetPrioritySettings() method. Priority settings are used by the Audio Policy component to resolve multiple requests to access the audio hardware.

Call the CMMFDevSound::PlayToneSequenceL(const TDesC8 + &) function to start playing a tone sequence. This method has one parameter, &aData, the tone sequence that is to be played. Call the MDevSoundObserver::ToneFinished(TInt) function to complete successfully a tone sequence playing. If a tone sequence is not valid, MDevSoundObserver::ToneFinished(TInt) returns with an error of KErrCorrupt. Note: Further calls to CMMFDevSound::PlayToneSequenceL(const TDesC8 &) can be made both before and after the MDevSoundObserver::ToneFinished(TInt) callback is received. Pausing and + Resuming a Tone \ No newline at end of file