Charlie,
If the speakers are permanent magnet types, which most are, anything closer than 24 inches is too close. Even at that distance, there can be some detremental affect on the disk information. Additionally, you must keep in mind that all floppy disks have a shelf life. After a while, they tend to loose their magnetic qualities and the data becomes useless.
The best advice for those of you who have lots of midi files stored on floppies is to transfer the files to CDs. In most cases, a single CD can store all of your midi files and still have lots of room left over. CD's are not magnetic and the data is just about indestructable. Retrieval time is quite fast, and you can always transfer selected midis onto a floppy for use during jobs.
Cheers,
Garu
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)