Max lets you monitor the parts of your patch that are running at audio
rates using the signal probe.
Viewing a Signal
Position your cursor over an audio patchcord in a locked or unlocked patcher
window. If the audio scheduler is running, a signal probe display will appear,
showing the current signal values, along with an LED audio out indicator.
Disabling signal probing
Choose Probing from the Debug menu. Probing will be disabled and
the menu item will no longer have a check to indicate it is enabled.