The Speaker API provides means to control computer's built-in beeper speaker.

\begin{tabularx}{\textwidth}{l l X}
	\textbf{\large Function} & \textbf{\large Return} & \textbf{\large Description}
	\\ \\
	\endhead
	speaker.enqueue(len: int, freq: num\footnote{Frequency in hertz (double) or the name of the note (``A-5'', ``B3'', ``F\#2'', ``Db6'', \ldots)}) & nil & Enqueues speaker driving information. Queues will be started automatically.
	\\ \\
	speaker.clear() & nil & Clears speaker queue.
	\\ \\
\end{tabularx}