blockBackpack.onPostBlockPlaced(world, x, y, z, orientation.ordinal());
TileEntityBackpack te = WorldUtils.get(world, x, y, z, TileEntityBackpack.class);
te.stack = backpack.copy();
if (ItemBackpack.getBackpack(carrier) == backpack)
te.unequip(carrier, despawn);
String sound = blockBackpack.stepSound.func_150496_b();
float volume = (blockBackpack.stepSound.getVolume() + 1.0F) / 2.0F;
float pitch = blockBackpack.stepSound.getPitch() * 0.8F;
world.playSoundEffect(x + 0.5, y + 0.5, z + 0.5F, sound, volume, pitch);