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How and Why to Convert Analog Signals to PWM Signals
https://resources.pcb.cadence.com/blog/2021-how-and-why-to-convert-analog-signals-to-pwm-signals#:~:text=A%20low-cost%20method%20to%20convert%20analog%20to%20PWM,by%20feeding%20in%20an%20analog%20signal%20of%200-1V.
analog audio in to PWM audio out - Audio - Arduino Forum
https://forum.arduino.cc/t/analog-audio-in-to-pwm-audio-out/139411
it takes in audio on ADC0 and uses a dual pwm to create 16b audio out. you can process the audio in-between and make a low-fi effects pedal. it can be used for just analog out as well, and is much higher quality than using analogwrite (although more complicated too). there is a much more in-depth tutorial on pwm in general up here:
Analog Audio signal to PWM converter - Audio forum - Audio ...
https://e2e.ti.com/support/audio-group/audio/f/audio-forum/454095/analog-audio-signal-to-pwm-converter
I would recommend you to tale a look to the TAS5611A, this device has analog inputs and offers the same power performance of the TAS5622A. If you want to use TAS5622A, you may need to add an ADC to convert the analog input to digital audio, then a PWM modulator that will convert digital audio into PWM output for the amplifier. Best Regards,
Learn How to Use PWM to Generate an Audio Signal From Your ...
https://www.hackster.io/news/learn-how-to-use-pwm-to-generate-an-audio-signal-from-your-raspberry-pi-pico-00347dece8b8
From there you can go to Grosset’s GitHub page to download the C library and code that you will to take an audio file and convert it into a PWM single. This code is pretty clever, because it uses interrupts to essentially buffer the next change to the GPIO pin.
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