Audio output

The native executable plays sound itself through miniaudio, since a native image finds no Java Sound mixers, picking the first backend that answers (WASAPI, CoreAudio, PulseAudio, ALSA, JACK) or the one named with --output; --output null plays into nothing at the right speed and the runnable jar uses Java Sound. --record FILE keeps a wave file of everything played and --quit-after SECONDS stops Paula without a terminal, which is how the build proves the sound on every platform. Logging goes to paula.log in the working directory.

Over ssh, tools/paula-sound plays out of the machine you sit at: that machine serves PulseAudio on its loopback with pactl load-module module-native-protocol-tcp listen=127.0.0.1 and carries a reverse tunnel with RemoteForward 4713 127.0.0.1:4713 in its ~/.ssh/config; the script points PULSE_SERVER at the tunnel and says what is missing when nothing answers.