No in the speaker! Cords can be faulty! Okay, an example could help...maybe not...
The energies (as I explained in the algebraic theory) could be faulty!
Normal (not a real byte): 01010100010101110101010101110 10111101
Faulty (same, not real) 10111111111111111111111111111 110101011
That is not a real one!