113 lines
5.9 KiB
HTML
113 lines
5.9 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns:MadCap="http://www.madcapsoftware.com/Schemas/MadCap.xsd" MadCap:lastBlockDepth="6" MadCap:lastHeight="94" MadCap:lastWidth="853" MadCap:disableMasterStylesheet="true" MadCap:tocPath="" MadCap:InPreviewMode="false" MadCap:PreloadImages="false" MadCap:RuntimeFileType="Topic" MadCap:TargetType="WebHelp" lang="en-us" xml:lang="en-us" MadCap:PathToHelpSystem="../../../" MadCap:HelpSystemFileName="Default.xml" MadCap:SearchType="Stem">
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<head><title>SOUND</title>
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<link href="../../SkinSupport/MadCap.css" rel="stylesheet" />
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<link href="../../Resources/Stylesheets/BSE_Help.css" rel="stylesheet" />
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<script src="../../SkinSupport/MadCapAll.js" type="text/javascript">
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</script>
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</head>
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<body>
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<h1 class="code">SOUND</h1>
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<div class="ImagePlusCaption">
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<div class="Col2">
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<p>
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<img src="../../graphics/pgm_icon1.gif" border="0" alt="BS1 icon" title="BS1 icon" /><span class="code_in_text"> {PBASIC 1.0}</span>
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</p>
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</div>
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<p style="text-align: right;"><a href="../ExampleTopics/SoundEx.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">SOUND Example</a>
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</p>
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<p> </p>
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</div>
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<p class="clear"> </p>
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<p> </p>
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<p class="PlainText">Syntax: <span class="keyword_in_text">SOUND</span> <![CDATA[ ]]><i>Pin</i>, (<i>Note</i>,<i> Duration </i>{,<i> Note, Duration</i>...})</p>
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<h2>Function</h2>
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<p class="PlainText">Generate square-wave tones for a specified duration.
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</p>
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<ul>
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<li value="1"><b><i>Pin</i></b> is a variable/constant (0 - 7) that specifies the I/O pin
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to use. This pin will be set to output mode.</li>
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<li value="2"><b><i>Note</i></b> is a variable/constant (0 - 255) specifying the type and
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frequency of the tone. 1 - 127 are ascending tones and 128 - 255 are ascending
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white noises ranging from buzzing (128) to hissing (255).</li>
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<li value="3"><b><i>Duration</i></b> is a variable/constant (1 - 255) specifying the amount
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of time to generate the tone(s). The unit of time for <i>Duration</i> is 12
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ms.</li>
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</ul>
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<p class="PlainText">Note: See <a href="FREQOUT.htm" target="" title="" alt="" class="MCXref_0" xrefformat="{paratext}">FREQOUT</a> for all BS2 models.</p>
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<h2>Quick Facts</h2>
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<table cellpadding="4" cellspacing="0" border="1" style="caption-side: top;width: 100%;">
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<col />
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<col />
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<tr bgcolor="#CFCFCF">
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<td width="15%" align="center"> </td>
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<td width="85%" align="center">BS1</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Units in Duration</td>
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<td>
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<p align="center">12 ms</p>
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</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Available Sounds</td>
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<td>
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<p align="center">256</p>
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</td>
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</tr>
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<tr>
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<td align="center" bgcolor="#CFCFCF">Frequency Range</td>
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<td>
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<p align="center">94.8 Hz to 10,550 Hz</p>
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</td>
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</tr>
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</table>
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<h2>Explanation</h2>
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<p class="PlainText"><span class="keyword_in_text">SOUND</span> generates one of 255 square-wave frequencies on an I/O pin. The output
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pin should be connected as shown in the circuits below. </p>
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<p class="PlainText">The tones produced by <span class="keyword_in_text">SOUND</span> can vary in frequency from 94.8 Hz (1) to
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10,550 Hz (127). If you need to determine the frequency corresponding to a given
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note value, or need to find the note value that will give you best approximation
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for a given frequency, use the equations below.</p>
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<center>Note = 127 - (((1 ÷ Frequency) - 0.000095) ÷ 0.000083)
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<br></br><br></br>-- and --
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<br></br><br></br>Frequency = (1 ÷ (0.000095 + ((127 - Note) x 0.000083))
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</center>
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<p class="PlainText"> </p>
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<p class="PlainText">Note, in the above equations, Frequency is in Hertz (Hz).</p>
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<center>
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<img src="../../graphics/freqout_sch.gif" border="0" />
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</center>
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<div class="Col2">
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<div class="MasterFoot">
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<p MadCap:conditions="BSEconditions.BSEWebHelp (Primary)-INCLUDE"><a href="../../HomeTopics/HomePage.htm">Go to Welcome page</a>
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</p>
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</div>
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</div>
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<div class="Col2">
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<div class="MasterFoot">
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<p style="text-align: right;"><span class="ContactInfoProjectName">BASIC Stamp Help</span> <![CDATA[ ]]><span class="ContactInfoVersion#">Version 2.5.4</span> <![CDATA[ ]]></p>
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<p style="text-align: right;">Copyright © <span class="ContactInfoCompanyName">Parallax Inc.</span></p>
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<p style="text-align: right;"><span class="SystemShortDate">8/8/2012</span>
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</p>
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</div>
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</div>
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