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<h2>
<span class="refentrytitle">turnoff2</span>
</h2>
<p>turnoff2 —
Turn off instance(s) of other instruments at performance time.
</p>
</div>
<div class="refsect1">
<a id="idm281472877138840"></a>
<h2>Description</h2>
<p>
Turn off instance(s) of other instruments at performance time.
</p>
</div>
<div class="refsect1">
<a id="idm281472877074888"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>turnoff2</strong></span> kinsno, kmode, krelease
</pre>
</div>
<div class="refsect1">
<a id="idm281472877072952"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kinsno</em></span>
-- instrument to be turned off (can be fractional) if zero or
negative, no instrument is turned off
</p>
<p>
<span class="emphasis"><em>kmode</em></span>
-- sum of the following values:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
<p>
0, 1, or 2: turn off all instances (0), oldest only
(1), or newest only (2)
</p>
</li>
<li class="listitem">
<p>
4: only turn off notes with exactly matching
(fractional) instrument number, rather than ignoring
fractional part
</p>
</li>
<li class="listitem">
<p>
8: only turn off notes with indefinite duration (p3
< 0 or MIDI)
</p>
</li>
</ul>
</div>
<p>
</p>
<p>
<span class="emphasis"><em>krelease</em></span>
-- if non-zero, the turned off instances are allowed to release,
otherwise are deactivated immediately (possibly resulting in
clicks)
</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>
As a rule of thumb, you should turn off instruments with a higher instrument number than the one where turnoff is called, as doing otherwise might cause initialization issues.
</p>
</td>
</tr>
</table>
</div>
</div>
<div class="refsect1">
<a id="idm281472877065432"></a>
<h2>Examples</h2>
<p>
The following example uses the turnoff2 opcode, s written by Lou
Cohen..
</p>
<div class="example">
<a id="idm281472877064392"></a>
<p class="title">
<strong>Example 1034. Example of the turnoff2 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="idm281472697593576"></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>
-odac <span class="c1">;;;realtime audio out</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
<span class="c1">; -o sin.wav -W ;;; for file output any platform</span>
<span class="nt"></CsOptions></span>
<span class="nt"><CsInstruments></span>
<span class="vg">sr</span> <span class="o">=</span> <span class="mi">48000</span> <span class="c1">;samples per second for sound</span>
<span class="vg">kr</span> <span class="o">=</span> <span class="mi">4800</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">1</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">32767</span>
gi<span class="n">sine</span> <span class="nb">ftgen</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">131073</span><span class="p">,</span> <span class="mi">9</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">0</span> <span class="c1">;single sine tone</span>
<span class="c1">;-----------------------------------------</span>
<span class="kd">instr</span> <span class="nf">2</span> <span class="c1">;start</span>
k<span class="n">trigger</span> <span class="nb">init</span> <span class="mi">0</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">then</span>
k<span class="n">Multiple</span> <span class="o">=</span> <span class="mf">1.1</span>
k<span class="n">Hz</span> <span class="o">=</span> <span class="mi">440</span>
k<span class="n">Amp</span> <span class="o">=</span> <span class="p">(</span><span class="vg">0dbfs</span><span class="o">/</span><span class="mi">10</span><span class="p">)</span>
<span class="c1">;startup four instances of instrument 200</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">3000</span><span class="p">,</span> k<span class="n">Amp</span><span class="p">,</span> k<span class="n">Hz</span>
k<span class="n">Amp</span> <span class="o">=</span> k<span class="n">Amp</span> <span class="o">*</span> <span class="mf">0.75</span>
k<span class="n">Hz</span> <span class="o">=</span> k<span class="n">Hz</span> <span class="o">*</span> k<span class="n">Multiple</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">3000</span><span class="p">,</span> k<span class="n">Amp</span><span class="p">,</span> k<span class="n">Hz</span>
k<span class="n">Amp</span> <span class="o">=</span> k<span class="n">Amp</span> <span class="o">*</span> <span class="mf">0.75</span>
k<span class="n">Hz</span> <span class="o">=</span> k<span class="n">Hz</span> <span class="o">*</span> k<span class="n">Multiple</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">3000</span><span class="p">,</span> k<span class="n">Amp</span><span class="p">,</span> k<span class="n">Hz</span>
k<span class="n">Amp</span> <span class="o">=</span> k<span class="n">Amp</span> <span class="o">*</span> <span class="mf">0.75</span>
k<span class="n">Hz</span> <span class="o">=</span> k<span class="n">Hz</span> <span class="o">*</span> k<span class="n">Multiple</span>
<span class="nb">event</span> <span class="s">"i"</span><span class="p">,</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">3000</span><span class="p">,</span> k<span class="n">Amp</span><span class="p">,</span> k<span class="n">Hz</span>
k<span class="n">Amp</span> <span class="o">=</span> k<span class="n">Amp</span> <span class="o">*</span> <span class="mf">0.75</span>
k<span class="n">Hz</span> <span class="o">=</span> k<span class="n">Hz</span> <span class="o">*</span> k<span class="n">Multiple</span>
k<span class="n">trigger</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">endif</span>
<span class="kd">endin</span>
<span class="c1">;---------------------------------------------</span>
<span class="kd">instr</span> <span class="nf">3</span> <span class="c1">;after 10 seconds, turn off the instruments</span>
k<span class="n">trigger</span> <span class="nb">init</span> <span class="mi">1</span>
<span class="k">if</span> <span class="p">(</span>k<span class="n">trigger</span><span class="o">==</span><span class="mi">1</span><span class="p">)</span> <span class="k">then</span>
<span class="nb">turnoff2</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">;turn off must recently started instrument instance</span>
k<span class="n">active</span> <span class="nb">active</span> <span class="mi">200</span> <span class="c1">;find out how many are still active</span>
<span class="nb">printk2</span> k<span class="n">active</span> <span class="c1">;print mainly to show progress</span>
<span class="nb">turnoff2</span> <span class="mi">200</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1</span> <span class="c1">;turn off all the rest of the instruments</span>
k<span class="n">active</span> <span class="nb">active</span> <span class="mi">200</span> <span class="c1">;find out how many are still active</span>
<span class="nb">printk2</span> k<span class="n">active</span><span class="p">,</span> <span class="mi">10</span> <span class="c1">;print to show progress</span>
<span class="k">endif</span>
<span class="kd">endin</span>
<span class="c1">;----------------------------------------------------</span>
<span class="kd">instr</span> <span class="nf">200</span> <span class="c1">;play the tone</span>
k<span class="n">Env</span> <span class="nb">linen</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.1</span><span class="p">,</span> <span class="nb">p3</span><span class="p">,</span> <span class="mf">0.1</span>
a<span class="n">r</span> <span class="nb">oscil</span> k<span class="n">Env</span><span class="o">*</span><span class="nb">p4</span><span class="p">,</span> <span class="nb">p5</span><span class="p">,</span> <span class="mi">1</span>
<span class="nb">out</span> a<span class="n">r</span>
<span class="nb">print</span> <span class="nb">p4</span><span class="p">,</span> <span class="nb">p5</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span><span class="mi">2</span> <span class="mi">0</span> <span class="mf">0.1</span>
<span class="nb">i</span><span class="mi">3</span> <span class="mi">10</span> <span class="mf">0.1</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="idm281472877060104"></a>
<h2>See Also</h2>
<p>
<a class="link" href="turnoff.html" title="turnoff"><em class="citetitle">turnoff</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472877058056"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Istvan Varga</td>
</tr>
<tr>
<td>2005</td>
</tr>
</table>
<p>
</p>
<p>New in Csound 5.00</p>
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