What's really interesting about this trend of distributing music on 3.5" floppy disks is that floppy disks are, and always have been, a 100% digital medium. They're not measured in minutes of play time, but rather in data capacity (typically 1.44MB per floppy disk).
Musicians who distribute their tracks on floppy disks have to perform all kinds of complicated digital manipulations to a track before it can fit into such a small space, and just as vinyl records and cassette tapes add their own unique character to the music recorded on them, these digital audio manipulation techniques also significantly impact the tonal and timbral characteristics of the finished product. 
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