<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>event</title>
<link rel="stylesheet" type="text/css" href="csound.css" />
<link rel="stylesheet" type="text/css" href="syntax-highlighting.css" />
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" />
<link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
<link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
<link rel="prev" href="evalstr.html" title="evalstr" />
<link rel="next" href="event_i.html" title="event_i" />
</head>
<body>
<div class="navheader">
<table width="100%" summary="Navigation header">
<tr>
<th colspan="3" align="center">event</th>
</tr>
<tr>
<td width="20%" align="left"><a accesskey="p" href="evalstr.html">Prev</a> </td>
<th width="60%" align="center">Orchestra Opcodes and Operators</th>
<td width="20%" align="right"> <a accesskey="n" href="event_i.html">Next</a></td>
</tr>
</table>
<hr />
</div>
<div class="refentry">
<a id="event"></a>
<div class="titlepage"></div>
<a id="IndexEvent" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">event</span>
</h2>
<p>event —
Generates a score event from an instrument.
</p>
</div>
<div class="refsect1">
<a id="idm281472939324488"></a>
<h2>Description</h2>
<p>
Generates a score event from an instrument.
</p>
</div>
<div class="refsect1">
<a id="idm281472939312440"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>event</strong></span> "scorechar", kinsnum, kdelay, kdur, [, kp4] [, kp5] [, ...]</pre>
<pre class="synopsis"><span class="command"><strong>event</strong></span> "scorechar", "insname", kdelay, kdur, [, kp4] [, kp5] [, ...]</pre>
</div>
<div class="refsect1">
<a id="idm281472939308840"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em><span class="quote">“<span class="quote">scorechar</span>”</span></em></span> -- A string (in double-quotes) representing the first p-field in a score statement. This is usually <a class="link" href="e.html" title="e Statement"><em class="citetitle"><span class="quote">“<span class="quote">e</span>”</span></em></a>, <a class="link" href="f.html" title="f Statement (or Function Table Statement)"><em class="citetitle"><span class="quote">“<span class="quote">f</span>”</span></em></a>, or <a class="link" href="i.html" title="i Statement (Instrument or Note Statement)"><em class="citetitle"><span class="quote">“<span class="quote">i</span>”</span></em></a>.
</p>
<p>
<span class="emphasis"><em><span class="quote">“<span class="quote">insname</span>”</span></em></span> -- A string (in double-quotes) representing a named instrument.
</p>
</div>
<div class="refsect1">
<a id="idm281472939251752"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kinsnum</em></span> -- The instrument to use for the event. This corresponds to the first p-field, p1, in a score statement.
</p>
<p>
<span class="emphasis"><em>kdelay</em></span> -- When (in seconds) the event will occur from the current performance time. This corresponds to the second p-field, p2, in a score statement.
</p>
<p>
<span class="emphasis"><em>kdur</em></span> -- How long (in seconds) the event will happen. This corresponds to the third p-field, p3, in a score statement.
</p>
<p>
<span class="emphasis"><em>kp4, kp5, ...</em></span> (optional) -- Parameters representing additional p-field in a score statement. It starts with the fourth p-field, p4.
</p>
<div class="note" style="margin-left: 0.5in; margin-right: 0.5in;">
<table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25">
<img alt="[Note]" src="images/note.png" />
</td>
<th align="left">Note</th>
</tr>
<tr>
<td align="left" valign="top">
<p> Note that the <span class="emphasis"><em>event</em></span> opcode cannot accept string p-fields. If you need to pass strings when instantiating an instrument, use the <a class="link" href="scoreline.html" title="scoreline"><em class="citetitle">scoreline</em></a> or <a class="link" href="scoreline_i.html" title="scoreline_i"><em class="citetitle">scoreline_i</em></a> opcode.</p>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="idm281472939244056"></a>
<h2>Examples</h2>
<p>
Here is an example of the event opcode. It uses the file <a class="ulink" href="examples/event.csd" target="_top"><em class="citetitle">event.csd</em></a>.
</p>
<div class="example">
<a id="idm281472939242408"></a>
<p class="title">
<strong>Example 247. Example of the event opcode.</strong>
</p>
<div class="example-contents">
<p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
<div class="refsect1">
<a id="idm281472771580136"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o event.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; Instrument #1 - an oscillator with a high note.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Create a trigger and set its initial value to 1.</span>
k<span class="n">trigger</span> <span class="nb">init</span> <span class="mi">1</span>
<span class="c1">; If the trigger is equal to 0, continue playing.</span>
<span class="c1">; If not, schedule another event.</span>
<span class="k">if</span> <span class="p">(</span>k<span class="n">trigger</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="k">goto</span> <span class="nl">contin</span>
<span class="c1">; kscoreop="i", an i-statement.</span>
<span class="c1">; kinsnum=2, play Instrument #2.</span>
<span class="c1">; kwhen=1, start at 1 second.</span>
<span class="c1">; kdur=0.5, play for a half-second.</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.5</span>
<span class="c1">; Make sure the event isn't triggered again.</span>
k<span class="n">trigger</span> <span class="o">=</span> <span class="mi">0</span>
<span class="nl">contin</span><span class="p">:</span>
a<span class="n">1</span> <span class="nb">oscils</span> <span class="mi">10000</span><span class="p">,</span> <span class="mi">440</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="c1">; Instrument #2 - an oscillator with a low note.</span>
<span class="kd">instr</span> <span class="nf">2</span>
a<span class="n">1</span> <span class="nb">oscils</span> <span class="mi">10000</span><span class="p">,</span> <span class="mi">220</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Make sure the score plays for two seconds.</span>
<span class="nb">f</span> <span class="mi">0</span> <span class="mi">2</span>
<span class="c1">; Play Instrument #1 for a half-second.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mf">0.5</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
<p>
Here is an example of the event opcode using a named instrument. It uses the file <a class="ulink" href="examples/event_named.csd" target="_top"><em class="citetitle">event_named.csd</em></a>.
</p>
<div class="example">
<a id="idm281472939238008"></a>
<p class="title">
<strong>Example 248. Example of the event opcode using a named instrument.</strong>
</p>
<div class="example-contents">
<div class="refsect1">
<a id="idm281472771471848"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Select audio/midi flags here according to platform</span>
<span class="c1">; Audio out Audio in No messages</span>
-odac -iadc -d <span class="c1">;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o event_named.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="c1">; Initialize the global variables.</span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">44100</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4410</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">10</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; Instrument #1 - an oscillator with a high note.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Create a trigger and set its initial value to 1.</span>
k<span class="n">trigger</span> <span class="nb">init</span> <span class="mi">1</span>
<span class="c1">; If the trigger is equal to 0, continue playing.</span>
<span class="c1">; If not, schedule another event.</span>
<span class="k">if</span> <span class="p">(</span>k<span class="n">trigger</span> <span class="o">==</span> <span class="mi">0</span><span class="p">)</span> <span class="k">goto</span> <span class="nl">contin</span>
<span class="c1">; kscoreop="i", an i-statement.</span>
<span class="c1">; kinsnum="low_note", instrument named "low_note".</span>
<span class="c1">; kwhen=1, start at 1 second.</span>
<span class="c1">; kdur=0.5, play for a half-second.</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="s">"low_note"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.5</span>
<span class="c1">; Make sure the event isn't triggered again.</span>
k<span class="n">trigger</span> <span class="o">=</span> <span class="mi">0</span>
<span class="nl">contin</span><span class="p">:</span>
a<span class="n">1</span> <span class="nb">oscils</span> <span class="mi">10000</span><span class="p">,</span> <span class="mi">440</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="c1">; Instrument "low_note" - an oscillator with a low note.</span>
<span class="kd">instr</span> <span class="nf">low_note</span>
a<span class="n">1</span> <span class="nb">oscils</span> <span class="mi">10000</span><span class="p">,</span> <span class="mi">220</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">1</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="c1">; Make sure the score plays for two seconds.</span>
<span class="nb">f</span> <span class="mi">0</span> <span class="mi">2</span>
<span class="c1">; Play Instrument #1 for a half-second.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mf">0.5</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
</div>
<div class="refsect1">
<a id="idm281472939236392"></a>
<h2>See also</h2>
<p><a class="link" href="event_i.html" title="event_i"><em class="citetitle">event_i</em></a>,
<a class="link" href="schedule.html" title="schedule"><em class="citetitle">schedule</em></a>,
<a class="link" href="schedwhen.html" title="schedwhen"><em class="citetitle">schedwhen</em></a>,
<a class="link" href="schedkwhen.html" title="schedkwhen"><em class="citetitle">schedkwhen</em></a>,
<a class="link" href="schedkwhennamed.html" title="schedkwhennamed"><em class="citetitle">schedkwhennamed</em></a>,
<a class="link" href="scoreline.html" title="scoreline"><em class="citetitle">scoreline</em></a>,
<a class="link" href="scoreline_i.html" title="scoreline_i"><em class="citetitle">scoreline_i</em></a></p>
</div>
<div class="refsect1">
<a id="idm281472939230232"></a>
<h2>Credits</h2>
<p>Examples written by Kevin Conder.</p>
<p>New in version 4.17</p>
<p>Thanks goes to Matt Ingalls for helping to fix the example.</p>
<p>Thanks goes to Matt Ingalls for helping clarify the kwhen/kdelay parameter.</p>
</div>
</div>
<div class="navfooter">
<hr />
<table width="100%" summary="Navigation footer">
<tr>
<td width="40%" align="left"><a accesskey="p" href="evalstr.html">Prev</a> </td>
<td width="20%" align="center">
<a accesskey="u" href="OpcodesTop.html">Up</a>
</td>
<td width="40%" align="right"> <a accesskey="n" href="event_i.html">Next</a></td>
</tr>
<tr>
<td width="40%" align="left" valign="top">evalstr </td>
<td width="20%" align="center">
<a accesskey="h" href="index.html">Home</a>
</td>
<td width="40%" align="right" valign="top"> event_i</td>
</tr>
</table>
</div>
</body>
</html>
distrib
>
Mageia
>
7
>
armv7hl
>
media
>
core-release
>
by-pkgid
>
5fcfcb7517038d1f44ab4e478e6e61fa
>
files
>
607
