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<div class="refentry" title="dumpk4">
<a id="dumpk4"></a>
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<a id="IndexDumpk4" class="indexterm"></a>
<div class="refnamediv">
<h2>
<span class="refentrytitle">dumpk4</span>
</h2>
<p>dumpk4 —
Periodically writes four orchestra control-signal values to an external file.
</p>
</div>
<div class="refsect1" title="Description">
<a id="idp18900688"></a>
<h2>Description</h2>
<p>
Periodically writes four orchestra control-signal values to a named external file in a specific format.
</p>
</div>
<div class="refsect1" title="Syntax">
<a id="idp18901400"></a>
<h2>Syntax</h2>
<pre class="synopsis"><span class="command"><strong>dumpk4</strong></span> ksig1, ksig2, ksig3, ksig4, ifilname, iformat, iprd</pre>
</div>
<div class="refsect1" title="Initialization">
<a id="idp18953680"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifilname</em></span> -- character string (in double quotes, spaces permitted) denoting the external file name. May either be a full path name with target directory specified or a simple filename to be created within the current directory
</p>
<p>
<span class="emphasis"><em>iformat</em></span> -- specifies the output data format:
</p>
<div class="itemizedlist">
<ul class="itemizedlist" type="disc">
<li class="listitem">
<p>1 = 8-bit signed char(high order 8 bits of a 16-bit integer</p>
</li>
<li class="listitem">
<p>4 = 16-bit short integers</p>
</li>
<li class="listitem">
<p>5 = 32-bit long integers</p>
</li>
<li class="listitem">
<p>6 = 32-bit floats</p>
</li>
<li class="listitem">
<p>7 = ASCII long integers</p>
</li>
<li class="listitem">
<p>8 = ASCII floats (2 decimal places)</p>
</li>
</ul>
</div>
<p>
</p>
<p>
Note that A-law and U-law output are not available, and that all formats except the last two are binary. The output file contains no header information.
</p>
<p>
<span class="emphasis"><em>iprd</em></span> -- the period of <span class="emphasis"><em>ksig</em></span> output in seconds, rounded to the nearest orchestra control period. A value of 0 implies one control period (the enforced minimum), which will create an output file sampled at the orchestra control rate.
</p>
</div>
<div class="refsect1" title="Performance">
<a id="idp18959024"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ksig1, ksig2, ksig3, ksig4</em></span> -- control-rate signals
</p>
<p>
This opcode allows four generated control signal values to be saved in a named external file. The file contains no self-defining header information. But it contains a regularly sampled time series, suitable for later input or analysis. There may be any number of <span class="emphasis"><em>dumpk4</em></span> opcodes in an instrument or orchestra but each must write to a different file.
</p>
</div>
<div class="refsect1" title="Examples">
<a id="idp18960656"></a>
<h2>Examples</h2>
<p>
Here is an example of the dumpk4 opcode. It uses the file <a class="ulink" href="examples/dumpk4.csd" target="_top"><em class="citetitle">dumpk4.csd</em></a>.
</p>
<div class="example">
<a id="idp18961624"></a>
<p class="title">
<strong>Example 197. Example of the dumpk4 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>
<pre class="programlisting">
<span class="csdtag"><CsoundSynthesizer></span>
<span class="csdtag"><CsOptions></span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o dumpk4.wav -W ;;; for file output any platform</span>
<span class="csdtag"></CsOptions></span>
<span class="csdtag"><CsInstruments></span>
<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span> <span class="op">=</span> 1
giSine <span class="ohdr">ftgen</span> 0, 0, 2^10, 10, 1
<span class="oblock">instr</span> 1 <span class="comment">;writes four control signals to a file</span>
kcf <span class="opc">randh</span> 950, 1, 2, 1, 1050 <span class="comment">;generates one random number between 100 and 2000 per second</span>
kq <span class="opc">randh</span> 10, 1, 2, 1, 11 <span class="comment">;generates another random number between 1 and 21 per second</span>
kdb <span class="opc">randh</span> 9, 1, 2, 1, <span class="op">-</span>15 <span class="comment">;amplitudes in dB between -24 and -6</span>
kpan <span class="opc">randh</span> .5, 1, 2, 1, .5 <span class="comment">;panning between 0 and 1</span>
<span class="opc">dumpk4</span> kcf, kq, kdb, kpan, "dumpk4.txt", 8, 1 <span class="comment">;writes the control signals</span>
<span class="opc">prints</span> "WRITING<span class="op">:</span>\n"
<span class="opc">printks</span> "kcf <span class="op">=</span> <span class="op">%</span>f, kq <span class="op">=</span> <span class="op">%</span>f, kdb <span class="op">=</span> <span class="op">%</span>f, kpan <span class="op">=</span> <span class="op">%</span>f\n", 1, kcf, kq, kdb, kpan <span class="comment">;prints them</span>
<span class="oblock">endin</span>
<span class="oblock">instr</span> 2 <span class="comment">;reads the file written by instr 1</span>
kcf,kq,kdb,kp <span class="opc">readk4</span> "dumpk4.txt", 8, 1
<span class="opc">prints</span> "READING<span class="op">:</span>\n"
<span class="opc">printks</span> "kcf <span class="op">=</span> <span class="op">%</span>f, kq <span class="op">=</span> <span class="op">%</span>f, kdb <span class="op">=</span> <span class="op">%</span>f, kpan <span class="op">=</span> <span class="op">%</span>f\n", 1, kcf, kq, kdb, kp <span class="comment">;prints values</span>
kdb <span class="opc">lineto</span> kdb, .1 <span class="comment">;smoothing amp transition</span>
kp <span class="opc">lineto</span> kp, .1 <span class="comment">;smoothing pan transition</span>
anoise <span class="opc">rand</span> <span class="opc">ampdb</span>(kdb), 2, 1
kbw <span class="op">=</span> kcf<span class="op">/</span>kq <span class="comment">;bandwidth of resonant filter</span>
abp <span class="opc">reson</span> anoise, kcf, kbw
aout <span class="opc">balance</span> abp, anoise
aL, aR <span class="opc">pan2</span> aout, kp
<span class="opc">outs</span> aL, aR
<span class="oblock">endin</span>
<span class="csdtag"></CsInstruments></span>
<span class="csdtag"><CsScore></span>
<span class="stamnt">i</span> 1 0 5
<span class="stamnt">i</span> 2 5 5
<span class="stamnt">e</span>
<span class="csdtag"></CsScore></span>
<span class="csdtag"></CsoundSynthesizer></span>
</pre>
</div>
</div>
<p><br class="example-break" />
The output should include lines like these:
</p>
<pre class="screen">
WRITING:
kcf = 1122.469723, kq = 11.762839, kdb = -14.313445, kpan = 0.538142
kcf = 1122.469723, kq = 11.762839, kdb = -14.313445, kpan = 0.538142
kcf = 1148.638412, kq = 12.040490, kdb = -14.061868, kpan = 0.552205
kcf = 165.796855, kq = 18.523179, kdb = -15.816977, kpan = 0.901528
kcf = 147.729960, kq = 13.071911, kdb = -11.924531, kpan = 0.982518
kcf = 497.430113, kq = 13.605512, kdb = -21.586611, kpan = 0.179229
READING:
WARNING: Seeding from current time 3308160476
kcf = 1122.469700, kq = 11.762800, kdb = -14.313400, kpan = 0.538100
kcf = 1122.469700, kq = 11.762800, kdb = -14.313400, kpan = 0.538100
kcf = 1148.638400, kq = 12.040500, kdb = -14.061900, kpan = 0.552200
kcf = 165.796900, kq = 18.523200, kdb = -15.817000, kpan = 0.901500
kcf = 147.730000, kq = 13.071900, kdb = -11.924500, kpan = 0.982500
kcf = 497.430100, kq = 13.605500, kdb = -21.586600, kpan = 0.179200
</pre>
<p>
</p>
</div>
<div class="refsect1" title="See Also">
<a id="idp18966072"></a>
<h2>See Also</h2>
<p>
<a class="link" href="dumpk.html" title="dumpk"><em class="citetitle">dumpk</em></a>,
<a class="link" href="dumpk2.html" title="dumpk2"><em class="citetitle">dumpk2</em></a>,
<a class="link" href="dumpk3.html" title="dumpk3"><em class="citetitle">dumpk3</em></a>,
<a class="link" href="readk.html" title="readk"><em class="citetitle">readk</em></a>,
<a class="link" href="readk2.html" title="readk2"><em class="citetitle">readk2</em></a>,
<a class="link" href="readk3.html" title="readk3"><em class="citetitle">readk3</em></a>,
<a class="link" href="readk4.html" title="readk4"><em class="citetitle">readk4</em></a>
</p>
</div>
<div class="refsect1" title="Credits">
<a id="idp18969992"></a>
<h2>Credits</h2>
<p>By: John ffitch and Barry Vercoe</p>
<p>1999 or earlier</p>
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