I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "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."? 

What is necessary to upgrade from 320 kbits?