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PWM Audio Generation With An AVR | Hackaday
https://hackaday.com/2008/02/07/pwm-audio-generation-with-an-avr/
[Dane] sent in hissweet AVR hack. He used the PWM output to play pre-recorded audio output. It’s not very high quality, but it could be useful for …
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.
AVR PWM Pulse Width Modulation - Tutorial #12
https://www.electroschematics.com/avr-pwm/
PWM & AVR. For making PWM, AVR contains separate hardware! By using this, the CPU instructs the hardware to produce PWM of a particular duty cycle. The ATmega8 has 3 PWM outputs, 2 are located on timer/counter1 (16bit) and 1 is located on timer/counter2 (8bit). Timer/Counter2 is the simplest PWM device on the ATmega8.
AVR131: Using the AVR’s High-speed PWM
https://ww1.microchip.com/downloads/en/AppNotes/Atmel-2542-Using-the-AVR-High-speed-PWM_ApplicationNote_AVR131.pdf
High-speed PWM In the AVR®, the timer/counters can be used to generate PWM signals. PWM base frequency is determined by timer clock frequency and top counter value. Faster clock frequency will increase the PWM base frequency and vice versa. Lower top value will reduce the time for overflow, which thereby increases the PWM frequency.
pwm audio generation - AVR Freaks
https://www.avrfreaks.net/forum/pwm-audio-generation
An AVR cannot really do 16bit PWM at audio frequencies so you are likely to use 8bit audio. As for sampling frequency that depends on the quality of audio you want. I would say that 44.1kHz is unachievable but having used 8bit 8KhZ myself played thorough a small LM386 amplifier it's actually pretty reasonable for an 8bit micro if you just want ...
Sound Generation by AVR Micro - Tutorial I
https://extremeelectronics.co.in/avr-tutorials/sound-generation-by-avr-micro-tutorial-i/
Cost AVR Development boardto run the demo. Just hook a small (about 1 or 2 watt ) 8ohm speaker between PB3 and GNDand you are ready. Those who don’t have the Low Cost AVR Development boardmay buy it from our online shopor build it at home as described here. The fuse bytes must be programmed as HIGH FUSE=C9 LOW FUSE=FF.
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