I really appreciated both the technical descriptions (esp. those lookup tables) and the historical portions saying where the DX-7 was in relation to other Yamah

I really appreciated both the technical descriptions (esp. those lookup tables) and the historical portions saying where the DX-7 was in relation to other Yamaha FM synths like the 4-operator ones. I originally got very interested in this when discovering the YM-2151 chip that made 80's arcade game sounds was also found in pro-audio keyboards. They used a very similar YM-2164. This got me to explore the whole DX line including DX-7, DX-9, DX-27S and that keytar that's still popular for bass and talkbox, the DX-100.