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work_files/usermanuals/romapidoc/api_speaker.tex

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+The Speaker API provides means to control computer's built-in beeper speaker.
+
+\section{Functions}
+
+\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.
+	\\ \\
+	speaker.retune(str or nil) & nil & Retunes speaker to specified tuning (e.g. ``A415'', ``C256'', ``A\#440''). If no argument is given, A440 will be used.
+	\\ \\
+	speaker.resetTune() & nil & Retunes speaker to A440.
+	\\ \\
+	speaker.toFreq(string) & int & Translates input note name to matching frequency based on current speaker tunining.
+\end{tabularx}
+
+\section{Constants}
+
+\begin{tabularx}{\textwidth}{l l X}
+	\textbf{\large Name} & \textbf{\large Type} & \textbf{\large Description}
+	\\ \\
+	\endhead
+	speaker.\_\_basefreq\_\_ & number & Frequency of note A-0.
+\end{tabularx}