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PWM Audio Generation With An AVR | Hackaday
https://hackaday.com/2008/02/07/pwm-audio-generation-with-an-avr/
13 thoughts on “ PWM Audio Generation With An AVR ” Zach says: February 8, 2008 at 12:56 am ... Surely you can use the open sourced mp3 lib …
AVR Audio player using PWM with audio file. - YouTube
https://www.youtube.com/watch?v=FAwCklu43bg
We used wave file to get .c file stored in mega 32 with using PWM to play sound .
AVR PCM audio: Playing 8 bit PCM using any AVR ...
https://avrpcm.blogspot.com/2010/11/playing-8-bit-pcm-using-any-avr.html
This is a simple procedure to play PCM audio on any AVR microcontroller. AVR's high speed PWM is used to play the audio. It almost sound fine and can be used for simple projects that require sound effects. The code is compiled in winavr GCC compiler. The microcontroller used is ATmega32, though any AVR processor can be used for the purpose.
pwm audio generation | AVR Freaks
https://www.avrfreaks.net/forum/pwm-audio-generation
The way these things relate to the PWM is that you want the PWM frequency to be some multiple of the sample frequency and you want the number of steps for the duty cycle (effectively "pulse height") to be either 256 (8bit) or 65536 (16bit). An AVR cannot really do 16bit PWM at audio frequencies so you are likely to use 8bit audio.
audio - Playing sounds on an AVR MCU - Electrical ...
https://electronics.stackexchange.com/questions/125447/playing-sounds-on-an-avr-mcu
I used an ATtiny85 to drive a speaker through a LPF via two complementary PWM outputs (OC1B/nOC1B) upon pressing a button. Less than 0.5k of code leaves 7.5k for the audio. Larger chips leave more space for audio or the ability to use real SPI or I 2 C for storage. Volume depends on the supply voltage, but you can still get decent performance ...
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