This was not unheard of. CD-Extra/Mixed Mode CDs were used for a lot of games[1] because they could use the drive's hardware decoding so there was no performanc

This was not unheard of. CD-Extra/Mixed Mode CDs were used for a lot of games[1] because they could use the drive's hardware decoding so there was no performance impact. At that time decoding a MP3 track could take more than 50% CPU. [1] http://en.wikipedia.org/wiki/Mixed_Mode_CD#List_of_Mixed_Mode_CDs_.28computer_games.29 http://en.wikipedia.org/wiki/Mixed_Mode_CD#List_of_Mixed_Mod...