PitchVis

New: PitchVis can now analyze the audio your phone is playing instead of the microphone. Turn on "System Audio" in the debug screen (tap the visualization to open it) and confirm Android's capture prompt. Audio only — no screen content is captured and nothing leaves the device. Playback has to be running already, since PitchVis stops when it goes to the background. Fixes: the screen lock no longer engages when a system dialog interrupts a touch, and the debug buttons no longer react while the s