Solved. If the PApplet child is in a package, you need to include the package reference:
public static void main(String args[]) {
PApplet.main(new String[] { "net.paulhertz.pixelaudio.TestPixelAudio" });
}
Thanks again @quark and @micycle, you comments were spot on:
– For Processing 4, make sure all relevant build path settings use Java 17
– Use the settings() method to set window width and height
Also check out @quark’s suggestion in post #9:
// Paul