code: public int getBitRate() {
          int result;
          switch (audioVersionId) {
              case 1:
                  // Unknown
                  return -1;
              case 0:
              case 2:
                  // Version 2 or 2.5
                  if (layerDescription == 3) {
                      // Layer 1
                      result = BITRATES[3][bitRateIndex];
                  } else if (layerDescription == 2 || layerDescription == 1) {
                      // Layer 2 or 3
                      result = BITRATES[4][bitRateIndex];
                  } else {
                      // Unknown layer
                      return -1;
                  }
                  break;
              case 3:
                  // Version 1
                  if (layerDescription == 3) {
                      // Layer 1
                      result = BITRATES[0][bitRateIndex];
                  } else if (layerDescription == 2) {
                      // Layer 2
                      result = BITRATES[1][bitRateIndex];
                  } else if (layerDescription == 1) {
                      // Layer 3
                      result = BITRATES[2][bitRateIndex];
                  } else {
                      // Unknown layer
                      return -1;
                  }
                  break;
              default:
                  // Unknown version
                  return -1;
          }
          return result * 1000;
      }
docs: Getter for bitrate
  
  @return File bitrate