Well, there was sometime ago a project where a guy copied amiga disks to the pc using two floppy drives, dunno where there's a link of this...
AFAIK there's also an usb-external amiga diskdrive adapter, but I guess you still need a lot of soldering and programming.
The easiest option is the Catweasel controller; normal pc floppy controllers just can't do the job.
The amount of fuss/money just doesn't justify the ease of downloading an image, trust me. (unless you got a 9k6 modem or something like that)
And ripping a midi? Well, it can be done in principle, though I never heard of someone who has written a program to do this. Google is as much your friend as mine.