This project is an experiment of the Digital Signal Processing based on microcontroller AVR AtTiny 26 instead of an ordinary digital signal processor. The project used as simple audio signal processing. There are some simple audio processing, such as Delay, Echo, Pitch Conversion, that easy to experiment with the project.
The microcontroller samples input signal and applies any process, and then output the processed wave form. When the microcontroller has any analog I/O units, such as ADC, DAC and PWM, no additional component is required. However signal processing requires a number of working memory proportional to the data latency so that built-in RAM will not suffice for the process and most case requires any external RAM.
Digital Signal Processing
Project Documentation and Schematic