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Atmega audio playback | AVR Freaks
https://www.avrfreaks.net/forum/atmega-audio-playback
Audio playback with 2 PWMs in ATmega328p using ...
https://forum.arduino.cc/t/audio-playback-with-2-pwms-in-atmega328p-using-simplesdaudio-library/407094
My project wants to play audio from SD card with minimum power and smallest size (for toy usage). I am using SimpleSDAudio library in ATmega328p now. (SimpleSDAudio – Hackerspace Ffm) I want to use 2 PWM for 16-bit mono playback (reduce the noise), the library is required to use pin 9 and 10. However, the SD card SS pin is fixed in the pin 10.
WAV Playback With An ATmega32 | Hackaday
https://hackaday.com/2012/02/29/wav-playback-with-an-atmega32/
ATmega ADC tutorial | Open Music Labs
http://www.openmusiclabs.com/learning/digital/atmega-adc/index.html
AVR42777: Digital Sound Recorder using DAC with ATtiny817
https://ww1.microchip.com/downloads/en/appnotes/atmel-42777-digital-sound-recorder-using-dac-with-attiny817_applicationnote_avr42777.pdf
sound data sampling and playback is identical for both; the only difference is the mode of data storage. The first stores raw data on an SD card, and is designed to be used with an ATtiny817 Xplained Pro and external components. The second project is for the ATtiny817 Parrot Field Engagement Board, and uses
ECE 4760 16-bit Stereo Wave Player
https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/f2014/wz233/ECE%204760%20Final%20Report%20(HTML)/ECE%204760%20Stereo%20Player.html
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