Summary of Generating AUDIO ECHO using Atmega32 microcontroller
This project demonstrates audio echo generation using an Atmega32 microcontroller. It captures voice signals through an electret microphone, converts them to digital signals via the ADC, and stores samples in a 1900-byte circular buffer to create delayed feedback, producing an echo effect. The approach showcases simple digital signal processing on a microcontroller with limited RAM, and suggests potential for other DSP experiments with similar methods.
Parts used in the Audio Echo Generation using Atmega32:
- Atmega32 microcontroller
- Electret microphone
- ADC (Analog to Digital Converter) module (internal to Atmega32)
- Amplification and level shifting circuitry
- 2KB RAM (internal to Atmega32)
Introduction:
But now I can do this very easily by a simple digital signal processing using a microcontroller. It’s concept is very simple, ie we need to apply a proper delayed feedback in digital samples with in a circular buffer. I did this using an atmega32 microcontroller and it worked fine. This is simple but really an interesting project. Not only an echo, but we can do a lot of fun with this type of small DSP experiments if we have considerably large RAM in the mcu…