a1exwang / dafx_labs

Some quick and dirty experiments while reading the book DAFX(Digital Audio Effects).

DAFX experiments

Reading the book Digital Audio Effects(DAFX), and implementing the synthesizers, filters and effects.

Goals

• Correctly implement all the effects in the book and other common effect that are not present in the book but a reliable implementation can be found, using its original implementation or other simpler and faster implementations.
• Visualize as much as possible to get a better understanding of the underlying algorithm.
• Simple and Easy to Understand, we use Python to make the code simpler and easier to understand.
• We can interactively changing the parameters and see what happens. To achieve it, we use Jupyter as our UI.

Non-goals

• This is not a project for production use, so performance is not our main goal, as long as it does not affect playability.
• Real time rendering is not our goal, either.

Done

• Basic stuff
  • Channels and connections(like in any DAW)
  • Complex number intermediates
  • Impulse response plotting
  • Spectrum plotting
• Synthesizers
  • Simple oscillators(Sine, Saw, Noise)
  • Sampler
• Filters and Delays
  • Comb filter(delay line), GrossBeat
  • IIR filter
  • Vibrato, Echo, Slapback, Flanger
• Modulators
  • Single Side Band
  • Ring Modulator
  • Amplitude Modulator
  • Phase Modulator
  • Frequence Modulator
• Non-linear Processing
  • Limiter
  • Compressor
  • Expander

TODOs

- Wah-Wah Filter, Bell
- Time/Frequency Warping