Adding equalizer to the Symbian C++ audio player

Symbian has several audio enhancement APIs that can be used to modify the audio experience. One of them is the CAudioEqualizerUtility API. This snippet can be self-signed.

Article Metadata

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Code Example

Source file: Media:PlayerExtrasExample.zip

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Tested with

Devices(s): Nokia N95

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Compatibility

Platform(s): S60 3rd Edition

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Platform Security

Signing Required: Self-Signed

Capabilities: None

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Article

Keywords: CAudioEqualizerUtility, TEfAudioEqualizerUtilityPreset

Created: User:Technical writer 1 (09 Oct 2008)

Last edited: hamishwillee (03 Dec 2012)

Preconditions

The audio player must be fully constructed before constructing the instance of the API. This can be done with the following lines of code:

 iMdaAudioPlayerUtility = CMdaAudioPlayerUtility::NewFilePlayerL(aFileName,
                                          *this,
                                          EMdaPriorityNormal,
                                          EMdaPriorityPreferenceTimeAndQuality);

MMP file

The following capabilities and libraries are required:

CAPABILITY NONE
LIBRARY AudioEqualizerUtility.lib  
Header audioequalizerutility.h

Source file

First you need to construct the equalizer instance:

 iAudioEqualizerUtility = CAudioEqualizerUtility::NewL(*iMdaAudioPlayerUtility);

Use the following code to query equalizer presets:

 TArray<TEfAudioEqualizerUtilityPreset> allPresets = 
   iAudioEqualizerUtility->Presets();

Use the following code to apply an equalizer preset:

 iAudioEqualizerUtility->ApplyPresetL(preSetIndex);
 // where preSetIndex is 0 to (iAudioEqualizerUtility->Presets().Count() – 1)

Test application

File:PlayerExtrasExample.zip

See also

• Adding doppler effects to the audio player in Symbian C++
• Adding source location effects to the Symbian C++ audio player
• Adding listener's location effects to the Symbian C++ audio player
• Adding bass boost to the Symbian C++ audio player
• Adding stereo widening to the Symbian C++ audio player
• Adding reverb to the Symbian C++ audio player