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Arduino (ATmega) PWM audio DAC - Open Music Labs Wiki
http://wiki.openmusiclabs.com/wiki/PWMDAC
Arduino (ATmega) PWM audio DAC. About PWM on the Arduino (ATmega) This page describes all the nitty gritty of getting your Arduino set up to output decent audio on its PWM via Timer1. For more in-depth information on what the settings mean, and what values are right for your application, please check out our PWM Tutorial on the main site.
avr - Audio PWM on atmega644 - Electrical Engineering ...
https://electronics.stackexchange.com/questions/205453/audio-pwm-on-atmega644
To do PWM audio, you probably want a higher frame rate. The ATtiny family can do PWM with an imprecise ~64 MHz clock rate multiplied up from the internal oscillator. Various ARM parts can with a rate multiplied up from a more precise external crystal.
Atmega16 - audio on PWM output | AVR Freaks
https://www.avrfreaks.net/forum/atmega16-audio-pwm-output
I'm trying to read a .wav file from SD card, use data to control PWM output and send it to a simple speaker (8 Ohm, 0.5W connected directly to output via 150 Ohm resistor). Reading from card works OK (tested). My test wav file is a 3 second sine wave (3 different frequencies, 1 second each) recorded as 8000 Hz sample rate, 8 bits per sample.
PWM DAC | Open Music Labs
http://www.openmusiclabs.com/learning/digital/pwm-dac.1.html
6. Setting up your ATmega328 (Arduino). So, now that you have an idea of what PWM can do, here is a quick tutorial and Arduino sketch that has register settings for using Timer1 as a high quality, audio rate PWM generator. All you have to do is enter a few parameters, add a low-pass filter, and you’ll be making weird sounds in no time!
PWM in AVR ATmega16/ATmega32 | AVR ATmega Controllers
https://www.electronicwings.com/avr-atmega/atmega1632-pwm
AVR-based ATmega16/32 has inbuilt Pulse Width Modulation (PWM) unit through which the width of a pulse is varied while keeping the frequency constant.
PCM Audio Based Door Bell using Atmega32 microcontroller ...
https://atmega32-avr.com/pcm-audio-based-door-bell-using-atmega32-microcontroller/
PCM Audio Based Door Bell using Atmega32 microcontroller. 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 ...
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
The advantage of high-speed PWM is the increased bandwidth of the analog output signal. The high frequency further allows for smaller and less expensive filter components to be used in shaping the signal. • The fast PWM is used to generate a pulse train with varying duty-cycle • The PWM output is generated on the OC1A output pin (PB1)
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