There's a history of Chowning and FM here. Practical FM is closely linked to CCRMA's Samson Box which was designed by Peter Samson of System Concepts, who were

There's a history of Chowning and FM here. Practical FM is closely linked to CCRMA's Samson Box which was designed by Peter Samson of System Concepts, who were better known for building affordable(ish) DEC KL10 clones. https://120years.net/tag/ccrma/ https://120years.net/tag/ccrma/ When Chowning met Dave Bristow, who was Yamaha's product specialist and designed many of the DX7 presets, he apparently asked if Bristow could explain FM to him because he didn't really understand how to use it. This was partly a joke and... partly not. It was also before they wrote this together: http://www.burnkit2600.com/manuals/fm_theory_and_applications.pdf http://www.burnkit2600.com/manuals/fm_theory_and_application...