Please answer the following question: I know that the answer to the question "Is it the prefix non or standard that hits 640 kbit/s?" is in "Non-standard bit rates up to 640 kbit/s can be achieved with the LAME encoder and the freeformat option, although few MP3 players can play those files. According to the ISO standard, decoders are only required to be able to decode streams up to 320 kbit/s.". Can you tell me what it is?
A:
Non