Great, thanks for the reply! I don't mind going to the I2S DMA subsystem- that's exactly the sort of thing that makes this entirely usable even for an LED display.

I'm excited to get started!

I have purchased a couple of ESP-32 WROOM-32D boards and a 64x32 HUB75-interface LED matrix. I am programming it with the Arduino IDE. This is my first foray into 32-bit microcontrollers, and I have some questions. Are my ESP-32 boards running FreeRTOS? Or is that uploaded automatically by Arduino, ...