Types of synthesis ​

• Additive
• Subtractive
• Wavetable
• Amplitude modulation (Ring modulation)
• Frequency modulation
• Waveshaping
  • Saturation
  • Wave folding
  • Phase inversion
• Hard sync
• Granular

DSP ​

https://github.com/olilarkin/awesome-musicdsp

Delays ​

https://youtu.be/HGqFxjQI3is