Frequency Modulation

Computational Music Synthesis

Gearslutz thread on Songs which featured Lately Bass (TX81Z preset). Supposedly Madonna's Vogue features it too, but I can't hear it.
John Chowning's seminal paper on FM
Short video interview of John Chowning
"FM Synthesis: is the Frustration Justified?" (I think the answer is yes).

Yamaha DX7

Difference between Linear and Exponential FM

Synthesizer Keith explains FM

Ben and Gear explains FM

Inside Synthesis explains FM

("Part 1". There never was a part 2.)

Yamaha FS1R

(A repeat from the Filter section) Keep in mind that the sounds being made here are synthesized from scratch, and not samples stored in ROM.