We already know that Console.Beep(Frequency, Duration) is the way to do that.

A) I want to use mainboard piezoelectric buzzer (sounds more intense and alert) and in this case if your device does not have any built-in sound card, audio will not feed through in its stereo out. Comes out to buzzer instead. I ONLY want to use it directy.

B) I want to perform a sort of meaningful sounds (like removable devices insert/eject high-low and low-high pitch sequences or multiple shift pressing) but when we execute
Code:
Console.Beep(1800, 50)
Console.Beep(2200, 50)
right after eachother, a mute (or a distinguishable pause) will be heard.

1) Is it because external audio actuator?
2) Does piezo follow the way I want?
3) How othe application authors come up?
4) What is the shortest delay (2nd part of argument)? I experimentally achieved between 20 to 30 ms as my shortest possible duration. their shortest (1 and 1 ms) only performs 2 ticks.