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<h2>
<span class="refentrytitle">cngoto</span>
</h2>
<p>cngoto —
Transfers control on every pass when a condition is not true.
</p>
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<div class="refsect1">
<a id="idm281472946145672"></a>
<h2>Description</h2>
<p>
Transfers control on every pass when the condition is <span class="emphasis"><em>not</em></span> true.
</p>
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<div class="refsect1">
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<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>cngoto</strong></span> condition, label</pre>
<p>
where <span class="emphasis"><em>label</em></span> is in the same instrument block and is not an expression, and where <span class="emphasis"><em>condition</em></span> uses one of the Relational operators (<span class="emphasis"><em><</em></span>,<span class="emphasis"><em> =</em></span>, <span class="emphasis"><em><=</em></span>, <span class="emphasis"><em>==</em></span>, <span class="emphasis"><em>!=</em></span>) (and <span class="emphasis"><em>=</em></span> for convenience, see also under <a class="link" href="ControlConditional.html" title="Conditional Values"><em class="citetitle">Conditional Values</em></a>).
</p>
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<h2>Examples</h2>
<p>
Here is an example of the cngoto opcode. It uses the file <a class="ulink" href="examples/cngoto.csd" target="_top"><em class="citetitle">cngoto.csd</em></a>.
</p>
<div class="example">
<a id="idm281472946079272"></a>
<p class="title">
<strong>Example 137. Example of the cngoto 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="idm281472779347784"></a>
<pre class="programlisting">
<span class="nt"><CsoundSynthesizer></span>
<span class="nt"><CsOptions></span>
<span class="c1">; Audio out Audio in</span>
-odac -iadc <span class="c1">;;;RT audio I/O</span>
<span class="c1">; -o cngoto.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">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.</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="c1">; Change kval linearly from 0 to 2 over</span>
<span class="c1">; the period set by the third p-field.</span>
k<span class="n">val</span> <span class="nb">line</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mi">2</span>
<span class="c1">; If kval *is not* greater than or equal to 1 then play</span>
<span class="c1">; the high note. Otherwise, play the low note.</span>
<span class="k">cngoto</span> <span class="p">(</span>k<span class="n">val</span> <span class="o">>=</span> <span class="mi">1</span><span class="p">),</span> <span class="nl">highnote</span>
<span class="k">kgoto</span> <span class="nl">lownote</span>
<span class="nl">highnote</span><span class="p">:</span>
k<span class="n">freq</span> <span class="o">=</span> <span class="mi">880</span>
<span class="k">goto</span> <span class="nl">playit</span>
<span class="nl">lownote</span><span class="p">:</span>
k<span class="n">freq</span> <span class="o">=</span> <span class="mi">440</span>
<span class="k">goto</span> <span class="nl">playit</span>
<span class="nl">playit</span><span class="p">:</span>
<span class="c1">; Print the values of kval and kfreq.</span>
<span class="nb">printks</span> <span class="s">"kval = %f, kfreq = %f</span><span class="se">\\</span><span class="s">n"</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> k<span class="n">val</span><span class="p">,</span> k<span class="n">freq</span>
a<span class="n">1</span> <span class="nb">oscil</span> <span class="mi">10000</span><span class="p">,</span> k<span class="n">freq</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">; Table: a simple sine wave.</span>
<span class="nb">f</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">32768</span> <span class="mi">10</span> <span class="mi">1</span>
<span class="c1">; Play Instrument #1 for two seconds.</span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">2</span>
<span class="nb">e</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
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</div>
</div>
<p><br class="example-break" />
Its output should include lines like:
</p>
<pre class="screen">
kval = 0.000000, kfreq = 880.000000
kval = 0.999732, kfreq = 880.000000
kval = 1.999639, kfreq = 440.000000</pre>
<p>
</p>
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<div class="refsect1">
<a id="idm281472946074168"></a>
<h2>See Also</h2>
<p>
<a class="link" href="cggoto.html" title="cggoto"><em class="citetitle">cggoto</em></a>,
<a class="link" href="cigoto.html" title="cigoto"><em class="citetitle">cigoto</em></a>,
<a class="link" href="ckgoto.html" title="ckgoto"><em class="citetitle">ckgoto</em></a>,
<a class="link" href="goto.html" title="goto"><em class="citetitle">goto</em></a>,
<a class="link" href="if.html" title="if"><em class="citetitle">if</em></a>,
<a class="link" href="igoto.html" title="igoto"><em class="citetitle">igoto</em></a>,
<a class="link" href="tigoto.html" title="tigoto"><em class="citetitle">tigoto</em></a>,
<a class="link" href="timout.html" title="timout"><em class="citetitle">timout</em></a>
</p>
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<div class="refsect1">
<a id="idm281472946065432"></a>
<h2>Credits</h2>
<p>Example written by Kevin Conder.</p>
<p>New in version 4.21</p>
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