public void SetBandLevel(int index, int progress)
 {
     if (equalizer == null)
     {
         return;
     }
     else
     {
         short lowerEqualizer = equalizer.GetBandLevelRange()[0];
         int   result         = progress + lowerEqualizer;
         equalizer.SetBandLevel((short)index, (short)result);
     }
 }