text: Well you can try that musicrobot if you like and you might have some success. however that site just refers you to other sites.  Some sites may have free Midi files and some may not.  Now if you want a site that will allow you to directly download the midi files, like i do to my PDA Smartphone, you want to go to Http://www.mididb.com.  They have all kinds of midi files free and direct for you to download. alot of your 50's and 60's music is going to be in the Rock Section. you may find some in the country sections also.  Happy downloading :)