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Generating AUDIO ECHO using Atmega32 microcontroller ...
https://atmega32-avr.com/generating-audio-echo-using-atmega32-microcontroller/
I am using an Atmega32 microcontroller for the purpose. It is having RAM of 2KB and an ADC which is enough for demonstrating the concept of echo generation. An electert mic is used for capturing the voice. It is introduced to ADC with proper amplification and level shifting, which are more critical for the perfect operation.
Sound Effects Processor Using Mega32 - ATMega32 AVR
https://atmega32-avr.com/sound-effects-processor-using-mega32/
the audio input goes through an amplification and bias stage and then flows through the ADC which is controlled via the SPI by the microcontroller. the input is sampled at about 12,000 samples per second. We decided that 6 kHz and above will cover most of the frequency content of the expected audio signal. 12 kHz made it sound better.
Audio recording/playback using ATmega128 | AVR Freaks
https://www.avrfreaks.net/forum/audio-recordingplayback-using-atmega128
7200 X 8 =57600. To achieve a sampling frequency of 7200 Hz a sample has to be taken every 14.745Mhz/7200 = ~2048 cycles.To get one A/D conversion result each 2048 clock. cycles a conversion will be ready after 13 * 128 = 1664 cycles. i had to fill with 2048 -1664.
AtMega board and simple DSP tasks?? - Audio - Arduino Forum
https://forum.arduino.cc/t/atmega-board-and-simple-dsp-tasks/169070
Now the key concept: if both signal and noise are present, the two can be partially separated by looking at the amplitude of each frequency. If the amplitude is large, it is probably mostly signal, and should therefore be retained. If the amplitude is small, it can be attributed to mostly noise, and should therefore be discarded, i.e., set to zero.
AVR for audio processing - MOD WIGGLER
https://modwiggler.com/forum/viewtopic.php?t=66228
AVR for audio processing. From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive! Moderators: Kent, luketeaford, Joe. 6 posts • Page 1 of 1. Brownian Lotion Continuous random talk Posts: 386 Joined: Mon Sep 20, 2010 1:39 am. AVR for audio processing.
Arduino Realtime Audio Processing - Audio - Arduino Forum
https://forum.arduino.cc/t/arduino-realtime-audio-processing/64176
But 127 doesn't seem right, and I don't even think it's possible with that circuit (assuming you are directly reading the ADC). The Arduino has a 10-bit ADC. That means you can read values between zero an 1023. The normal half …
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