Whenever I attempt to read midi files from a certain Windows program in Max on my Macbook, I get an error message which says "filename.mid: sorry, I take single track files only." Can someone fill me in on what this is about? Much appreciated.
The seq object only opens single-track ("format 0") MIDI files. It sounds like your files are format 1 (multi-track), which is the format most programs use these days. You can find freeware programs that convert format 1 files to format 0 files.