The emergence of multitrack recording
Does Reel-to-Reel Sound Better Than Vinyl? - RX Reels
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When Did the CD Replace the Cassette Tape? – Southtree
The Man Who Invented The Cassette Tape Has Died; Lou Ottens Was 94 : NPR
Understanding Your Audio Formats: Audio Cassettes
Don't Call It a Comeback: Cassettes Have Sounded Lousy for Years (And Still Do!)
Reels For Reel-to-Reel Decks: Types, Sizes & Materials Compared - RX Reels
What's up with reel-to-reel cassettes?, by Reflective Observer
BEATS on TAPE: CASSETTE (Type II/IV) vs REEL-TO-REEL Comparison // Do They Sound Different??