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Yep, RMT's good too. PIO just feels like cheating.

ESP32 has RMT for the same thing!! Works great. But yes never bit bang, ever

Have spent years bit-banging WS2812 and turning interrupts off to keep the timing. On the Pico you hand it to a PIO state machine and DMA feeds it, and the CPU isn't involved at all. There's a ws2812 example in pico-examples that's about 10…