A Flutter plugin to open the device equalizer. You can also create a custom equalizer for Android.
Currently, supported on Android only. Need help for iOS contributions.
Edit your project's AndroidManifest.xml file to declare the permission to modify audio settings when creating a custom equalizer.
<manifest>
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<application...>
...
</application...>
</manifest>// Import package
import 'package:equalizer/equalizer.dart';
// Open device equalizer
Equalizer.open(audioSessionId);
// Set or remove audioSessionId.
Equalizer.setAudioSessionId(audioSessionId);
Equalizer.removeAudioSessionId(audioSessionId);You can retrieve
audioSessionIdon android from MediaPlayer. Info on how to do this can be found inopenEqualizerdocs.
Initialize the equalizer. Recommended to perform inside initState
Equalizer.init(audioSessionId);Enable the equalizer as follows.
Equalizer.setEnabled(true);Now you can query the methods.
await Equalizer.getBandLevelRange(); // provides band level range in dB.
await Equalizer.getBandLevel(bandId);
Equalizer.setBandLevel(bandId,bandLevel);
await Equalizer.getCenterBandFreqs(); // provides the center freqs in milliHertz.
await Equalizer.getPresetNames(); // returns presets that are available on device
Equalizer.setPreset(presetName);Finally, remember to release resources. Recommended to perform inside dispose
Equalizer.release();- Add iOS support.
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