The article discusses sound commands in computing, including the sound recording command and HTML audio command. Different methods of creating sound commands are explained, including HTML 4, HTML 5, and command line.
In general, a sound command could be any computer command that has to do with sound. There are two possible references that are more likely. One is the command used when recording sound from the command line. The other is the HTML audio command.
The command line, also called the DOS prompt when working in a Microsoft® environment, or the shell when working in a Mac, Linux or Unix environment, is a separate user interface from the graphical user interface (GUI) and can be used to issue commands to the operating system. The sound recording command has six standard parts, including the initial command, mono/stereo setting, sample rate, threading priority, recording time limit, and output file name, which identifies also the file format. Since some of these items are set by default, the simplest example would be:
$ sound recorder -P recording.wav
It is in HTML (HyperText Markup Language) 4, that there is the element that most resembles a sound command. Different browsers have different syntax requirements, and for the Mosaic browser to play a background sound, the HTML element is used. it was used with Navigator, but is now obsolete. is the standard alternative to HTML 4, and those who have used it have been advised to add , the standard method used for Internet Explorer®.
Creating a sound command with any of these three methods is similar. All three tags — , and — are followed by command parameters. Three are standard: SRC to set the path; LOOP to allow the sound to play a certain number of times or indefinitely until the page is closed; and DELAY to set a delay in seconds before playing an online sound. You can use an absolute or relative URL for the path. In an infinite loop, each of the three tags playing a file called birdsong.wav will look like this:
HTML 5 introduces a new approach to handling a sound command. The tag is and is used as a toggle tag, meaning there is a start and an end tag. Attributes related to this tag include autoplay, which plays the file as soon as possible; controls, which displays audio playback controls; preload, which loads the audio file on page load; and src, which defines the URL of the audio file.
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