Najprościej zrobić to na Linuksie, choćby na Rasbianie uruchomionym z innej karty na tym samym Raspberry Pi. Wkładasz szwankującą kartę microSD do adaptera SD, ten adapter do czytnika kart SD, a czytnik po USB podłączasz do działającego Raspbiana lub innego Linuksa. Karta SD pojawi się prawdopodobni...

Got it. Thanks for the explanation!

Thank you very much for the valuable information, joan, trejan, and jdb. The things are slowly getting more clear for me. Here are few more observations: on a freshly booted RPi4 with Raspbian Buster, the vcgencmd measure_clock pwm , executed few times within a minute or so, shows the PWM clock freq...

Yes. I've seen that information too: both RPi 4's PWM controllers (the PWM1, used to generate analog audio, and the PWM0, whose both channels can be redirected to GPIO pins) share the same clock and thus changing the clock divisor immediately distorts the audio. Do you know if it is possible to chec...

My goal is to have the ability to use hardware PWM with 20kHz frequency and, at the same time, being able to get audio from the analog 3.5 mm output. I need it for Raspberry Pi 4B, no matter what firmware version it has. After starting the 'pigpiod' daemon and executing 'pigs hp 12 20000 500000' com...

Hi everybody, I'd like to use hardware PWM on Raspberry Pi 4B and at the same time I need to be able to get undistorted audio output on the 3.5 mm jack. This actually works after adding 'dtoverlay=pwm,pin=12,func=4' to config.txt, but I'm not sure whether the hardware PWM frequency will be same on d...