Equalizer.usePreset throws Invalid argument exception

Question

I am creating an EQ media player, when I set the EQ bands, it works fine. I have a code that lists all the presets, when I change, I want to set the preset in EQ, but I get bad parameter value.

This is what I have in my journal:

09-29 14:29:24.810: W/System.err(27829): java.lang.IllegalArgumentException: AudioEffect: bad parameter value
09-29 14:29:24.835: W/System.err(27829):    at android.media.audiofx.AudioEffect.checkStatus(AudioEffect.java:1259)    
09-29 14:29:24.835: W/System.err(27829):    at android.media.audiofx.Equalizer.usePreset(Equalizer.java:342)

getNumberOfPresets () returns 12 and the preset for this example is 2 (but this happens for all values ​​0-11)

If I use setBandLevel()up usePreset(), it does not throw an exception, but I'm not sure if this is the right way to do this. Edit: setBandLevel has nothing to do with exception. It just appears by chance, 80% of the attempts.

Update: I noticed that this only happens on Samsung S3 devices (for now). Works great on the Asus TF101.

Any help is appreciated.

Here is the code:

mEqualizer = new Equalizer(0, mMediaPlayer.getAudioSessionId());
mEqualizer.setEnabled(true);
mEqualizer.usePreset((short)mEQPresetPos);

Answer 1

Perhaps this is due to two reasons.

Your device may not support the equalizer. But, as you said, you get a Preset list. This means that it supports.

Now the problem may be that you have two instances of the equalizer. you must free the equalizer.

or try

add equalizer.setEnabled(false);

before creating another.