What are the advantage and disadvantages of right justified I2S mode over Left justified I2S mode and Basic I2S mode?

Question

I2S specifications provide different modes of operation. I tried looking for advantages of one mode over the other but could not find any good literature. Can anyone provide or explain the advantage of one mode over the other ?

Answer 1

With samples that are aligned to the most significant bit, the sample length does not matter (because if the sent and expected sample lengths differ, any ignored or read-as-zero bits are the LSBs).

Otherwise, all choices are arbitrary and do not have any advantage whatsoever over each other. (This is why hardware designers choose one I²S mode at random, instead of selecting an obviously best mode.)