Left/Right Sound Channels

Such Problem: I have video file recorded with two sound channels. I have tried to switch off left sound channel by this code:

Code:

[COLOR=#2B91AF]Videoview[/COLOR] vv;
............... 
       vv.setOnPreparedListener([COLOR=#00008B]new[/COLOR] [COLOR=#2B91AF]OnPreparedListener[/COLOR]() { 
           [COLOR=#800000]@Override[/COLOR]            [COLOR=#00008B]public[/COLOR] [COLOR=#00008B]void[/COLOR] onPrepared([COLOR=#2B91AF]MediaPlayer[/COLOR] mp) { 
               mp.setVolume([COLOR=#800000]0.f[/COLOR], [COLOR=#800000]1f[/COLOR]); 
           } 
       });

... and on Tablet this work good (right volume channel sounds well). But then I tried it on googleTv and this code did not work, sound swichs off; mp.setVolume(1.f,0.f) - has no effect, sound continues playing in both channels.

Then I tried this:

Code:

[COLOR=#00008B]
public[/COLOR] [COLOR=#00008B]class[/COLOR] [COLOR=#2B91AF]MainActivity[/COLOR] [COLOR=#00008B]extends[/COLOR] [COLOR=#2B91AF]Activity[/COLOR] { 
   [COLOR=#2B91AF]MediaPlayer[/COLOR] mp = [COLOR=#00008B]null[/COLOR]; 
   [COLOR=#800000]@Override[/COLOR]    [COLOR=#00008B]protected[/COLOR] [COLOR=#00008B]void[/COLOR] onCreate([COLOR=#2B91AF]Bundle[/COLOR] savedInstanceState) { 
       [COLOR=#00008B]super[/COLOR].onCreate(savedInstanceState); 
       setContentView(R.layout.activity_main); 
       [COLOR=#00008B]if[/COLOR] (mp != [COLOR=#00008B]null[/COLOR]) { 
           mp.reset(); 
           mp.release(); 
       } 
       mp = [COLOR=#2B91AF]MediaPlayer[/COLOR].create([COLOR=#00008B]this[/COLOR], R.raw.test); 
       mp.start(); 
   } 
   [COLOR=#00008B]public[/COLOR] [COLOR=#00008B]void[/COLOR] onTurnOffLeft([COLOR=#2B91AF]View[/COLOR] v){ 
       mp.setVolume([COLOR=#800000]0.f[/COLOR], [COLOR=#800000]1.f[/COLOR]); 
   } 
   [COLOR=#00008B]public[/COLOR] [COLOR=#00008B]void[/COLOR] onTurnOffRight([COLOR=#2B91AF]View[/COLOR] v){ 
       mp.setVolume([COLOR=#800000]1.f[/COLOR], [COLOR=#800000]0.f[/COLOR]); 
   }
}

Method onTurnOffLeft switchs off all sound, and onTurnOffRight method has no effect.

I have tested on Visio Co-Star, and Logitech Revue google tv boxes with Optical and HDMI cables.

First I thougth the problem is in hdmi cable, but a have tried to connect lenovo tablet to TV through hdmi cable, and experiment with swithing off sound channels finished with success. So, I need help with this problem. Any ideas would be helpfull. Thank you.

 

Using .ogg audio file codded with Vorbis codec - method "setVolume" works well.Video files codded with mp3, ac3, pcm, aac - method "setVolume" not working correctly.