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112 lines
3.8 KiB
TeX
112 lines
3.8 KiB
TeX
\section{\module{winsound} ---
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Sound-playing interface for Windows}
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\declaremodule{builtin}{winsound}
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\platform{Windows}
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\modulesynopsis{Access to the sound-playing machinery for Windows.}
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\moduleauthor{Toby Dickenson}{htrd90@zepler.org}
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\sectionauthor{Fred L. Drake, Jr.}{fdrake@acm.org}
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\versionadded{1.5.2}
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The \module{winsound} module provides access to the basic
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sound-playing machinery provided by Windows platforms. It includes
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two functions and several constants.
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\begin{funcdesc}{Beep}{frequency, duration}
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Beep the PC's speaker.
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The \var{frequency} parameter specifies frequency, in hertz, of the
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sound, and must be in the range 37 through 32,767.
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The \var{duration} parameter specifies the number of milliseconds the
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sound should last. If the system is not
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able to beep the speaker, \exception{RuntimeError} is raised.
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\note{Under Windows 95 and 98, the Windows \cfunction{Beep()}
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function exists but is useless (it ignores its arguments). In that
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case Python simulates it via direct port manipulation (added in version
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2.1). It's unknown whether that will work on all systems.}
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\versionadded{1.6}
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\end{funcdesc}
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\begin{funcdesc}{PlaySound}{sound, flags}
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Call the underlying \cfunction{PlaySound()} function from the
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Platform API. The \var{sound} parameter may be a filename, audio
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data as a string, or \code{None}. Its interpretation depends on the
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value of \var{flags}, which can be a bit-wise ORed combination of
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the constants described below. If the system indicates an error,
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\exception{RuntimeError} is raised.
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\end{funcdesc}
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\begin{datadesc}{SND_FILENAME}
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The \var{sound} parameter is the name of a WAV file.
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Do not use with \constant{SND_ALIAS}.
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\end{datadesc}
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\begin{datadesc}{SND_ALIAS}
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The \var{sound} parameter is a sound association name from the
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registry. If the registry contains no such name, play the system
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default sound unless \constant{SND_NODEFAULT} is also specified.
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If no default sound is registered, raise \exception{RuntimeError}.
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Do not use with \constant{SND_FILENAME}.
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All Win32 systems support at least the following; most systems support
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many more:
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\begin{tableii}{l|l}{code}
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{\function{PlaySound()} \var{name}}
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{Corresponding Control Panel Sound name}
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\lineii{'SystemAsterisk'} {Asterisk}
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\lineii{'SystemExclamation'}{Exclamation}
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\lineii{'SystemExit'} {Exit Windows}
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\lineii{'SystemHand'} {Critical Stop}
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\lineii{'SystemQuestion'} {Question}
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\end{tableii}
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For example:
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\begin{verbatim}
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import winsound
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# Play Windows exit sound.
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winsound.PlaySound("SystemExit", winsound.SND_ALIAS)
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# Probably play Windows default sound, if any is registered (because
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# "*" probably isn't the registered name of any sound).
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winsound.PlaySound("*", winsound.SND_ALIAS)
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\end{verbatim}
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\end{datadesc}
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\begin{datadesc}{SND_LOOP}
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Play the sound repeatedly. The \constant{SND_ASYNC} flag must also
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be used to avoid blocking. Cannot be used with \constant{SND_MEMORY}.
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\end{datadesc}
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\begin{datadesc}{SND_MEMORY}
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The \var{sound} parameter to \function{PlaySound()} is a memory
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image of a WAV file, as a string.
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\note{This module does not support playing from a memory
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image asynchronously, so a combination of this flag and
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\constant{SND_ASYNC} will raise \exception{RuntimeError}.}
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\end{datadesc}
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\begin{datadesc}{SND_PURGE}
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Stop playing all instances of the specified sound.
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\end{datadesc}
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\begin{datadesc}{SND_ASYNC}
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Return immediately, allowing sounds to play asynchronously.
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\end{datadesc}
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\begin{datadesc}{SND_NODEFAULT}
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If the specified sound cannot be found, do not play the system default
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sound.
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\end{datadesc}
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\begin{datadesc}{SND_NOSTOP}
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Do not interrupt sounds currently playing.
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\end{datadesc}
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\begin{datadesc}{SND_NOWAIT}
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Return immediately if the sound driver is busy.
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\end{datadesc}
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