This repo is a guitar multi-effect based on Haawking HXS320F28034 DSP based on RISC-V RV32 architecture.
- distortion
- reverb
- delay
- high pass
- low pass
- mid pass
- tuner implemented by fft (also implemented by dft)
- The effects are based on ring-bus up to 1 second of sample buffer, which enables multiple effects working together.
- After each ADC interrupt, the buffer will be refreshed and effects will take place to refresh the buffer.
- The output is in the form of PWM signal. To produce normal sin waves, filter is required. A basic RC filter will suffice.
- To turn on each effect, simply add the effect to the loop. It works the same as a normal multi-effect.
- This project is a prototype, under development.
- Tuner is not very accurate due to limited capacity of RAM.
- This project will be updated when new generation of chips with larger ram and I2S output are available.
