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<h2>
<span class="refentrytitle">hsboscil</span>
</h2>
<p>hsboscil —
An oscillator which takes tonality and brightness as arguments.
</p>
</div>
<div class="refsect1">
<a id="idm281472925275976"></a>
<h2>Description</h2>
<p>
An oscillator which takes tonality and brightness as arguments, relative to a base frequency.
</p>
</div>
<div class="refsect1">
<a id="idm281472925232472"></a>
<h2>Syntax</h2>
<pre class="synopsis">ares <span class="command"><strong>hsboscil</strong></span> kamp, ktone, kbrite, ibasfreq, iwfn, ioctfn \
[, ioctcnt] [, iphs]</pre>
</div>
<div class="refsect1">
<a id="idm281472925230120"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ibasfreq</em></span> -- base frequency to which tonality and brighness are relative
</p>
<p>
<span class="emphasis"><em>iwfn</em></span> -- function table of the waveform, usually a sine
</p>
<p>
<span class="emphasis"><em>ioctfn</em></span> -- function table used for weighting the octaves, usually something like:
</p>
<div class="literallayout">
<p><span class="stamnt">f</span>1 0 1024 -19 1 0.5 270 0.5</p>
</div>
<p>
</p>
<p>
<span class="emphasis"><em>ioctcnt</em></span> (optional) -- number of octaves used for brightness blending. Must be in the range 2 to 10. Default is 3.
</p>
<p>
<span class="emphasis"><em>iphs</em></span> (optional, default=0) -- initial phase of the oscillator. If <span class="emphasis"><em>iphs</em></span> = -1, initialization is skipped.
</p>
</div>
<div class="refsect1">
<a id="idm281472925222440"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>kamp</em></span> -- amplitude of note
</p>
<p>
<span class="emphasis"><em>ktone</em></span> -- cyclic tonality parameter relative to <span class="emphasis"><em>ibasfreq</em></span> in logarithmic octave, range 0 to 1, values > 1 can be used, and are internally reduced to <span class="emphasis"><em>frac</em></span>(<span class="emphasis"><em>ktone</em></span>).
</p>
<p>
<span class="emphasis"><em>kbrite</em></span> -- brightness parameter relative to <span class="emphasis"><em>ibasfreq</em></span>, achieved by weighting <span class="emphasis"><em>ioctcnt</em></span> octaves. It is scaled in such a way, that a value of 0 corresponds to the orignal value of <span class="emphasis"><em>ibasfreq</em></span>, 1 corresponds to one octave above <span class="emphasis"><em>ibasfreq</em></span>, -2 corresponds to two octaves below <span class="emphasis"><em>ibasfreq</em></span>, etc. <span class="emphasis"><em>kbrite</em></span> may be fractional.
</p>
<p>
<span class="emphasis"><em>hsboscil</em></span> takes tonality and brightness as arguments, relative to a base frequency (<span class="emphasis"><em>ibasfreq</em></span>). Tonality is a cyclic parameter in the logarithmic octave, brightness is realized by mixing multiple weighted octaves. It is useful when tone space is understood in a concept of polar coordinates.
</p>
<p>
Making <span class="emphasis"><em>ktone</em></span> a line, and <span class="emphasis"><em>kbrite</em></span> a constant, produces Risset's glissando.
</p>
<p>
Oscillator table <span class="emphasis"><em>iwfn</em></span> is always read interpolated. Performance time requires about <span class="emphasis"><em>ioctcnt</em></span> * <span class="emphasis"><em>oscili</em></span>.
</p>
</div>
<div class="refsect1">
<a id="idm281472925209816"></a>
<h2>Examples</h2>
<p>
Here is an example of the hsboscil opcode. It uses the file <a class="ulink" href="examples/hsboscil.csd" target="_top"><em class="citetitle">hsboscil.csd</em></a>.
</p>
<div class="example">
<a id="idm281472925207960"></a>
<p class="title">
<strong>Example 408. Example of the hsboscil 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="idm281472772183192"></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 hsboscil.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">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; synth waveform</span>
gi<span class="n">wave</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">1024</span><span class="p">,</span> <span class="mi">10</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">1</span><span class="p">,</span> <span class="mi">1</span>
<span class="c1">; blending window</span>
gi<span class="n">blend</span> <span class="nb">ftgen</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="o">-</span><span class="mi">19</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mi">270</span><span class="p">,</span> <span class="mf">0.5</span>
<span class="kd">instr</span> <span class="nf">1</span> <span class="c1">; produces Risset's glissando.</span>
k<span class="n">amp</span> <span class="o">=</span> <span class="mf">.4</span>
k<span class="n">brite</span> <span class="o">=</span> <span class="mf">0.3</span>
i<span class="n">basfreq</span> <span class="o">=</span> <span class="mi">200</span>
i<span class="n">octcnt</span> <span class="o">=</span> <span class="mi">5</span>
<span class="c1">; Change ktone linearly from 0 to 1, </span>
<span class="c1">; over the period defined by p3.</span>
k<span class="n">tone</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">1</span>
a<span class="n">sig</span> <span class="nb">hsboscil</span> k<span class="n">amp</span><span class="p">,</span> k<span class="n">tone</span><span class="p">,</span> k<span class="n">brite</span><span class="p">,</span> i<span class="n">basfreq</span><span class="p">,</span> gi<span class="n">wave</span><span class="p">,</span> gi<span class="n">blend</span><span class="p">,</span> i<span class="n">octcnt</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">10</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 hsboscil opcode in a MIDI instrument. It uses the file <a class="ulink" href="examples/hsboscil_midi.csd" target="_top"><em class="citetitle">hsboscil_midi.csd</em></a>.
</p>
<div class="example">
<a id="idm281472925202568"></a>
<p class="title">
<strong>Example 409. Example of the hsboscil opcode in a MIDI instrument.</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="idm281472754159272"></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 </span>
-odac -M0 <span class="c1">;;;realtime audio out and realtime MIDI in</span>
<span class="c1">;-iadc ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="c1">; -o hsboscil_midi.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">44100</span>
<span class="vg">ksmps</span> <span class="o">=</span> <span class="mi">32</span>
<span class="vg">nchnls</span> <span class="o">=</span> <span class="mi">2</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="c1">; synth waveform</span>
gi<span class="n">wave</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">1024</span><span class="p">,</span> <span class="mi">10</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">1</span><span class="p">,</span> <span class="mi">1</span>
<span class="c1">; blending window</span>
gi<span class="n">blend</span> <span class="nb">ftgen</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="mi">1024</span><span class="p">,</span> <span class="o">-</span><span class="mi">19</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">0.5</span><span class="p">,</span> <span class="mi">270</span><span class="p">,</span> <span class="mf">0.5</span>
<span class="kd">instr</span> <span class="nf">1</span>
i<span class="n">base</span> <span class="o">=</span> <span class="nb">cpsoct</span><span class="p">(</span><span class="mi">6</span><span class="p">)</span>
i<span class="n">octcnt</span> <span class="o">=</span> <span class="mi">5</span>
<span class="c1">; all octaves sound alike.</span>
i<span class="n">tona</span> <span class="nb">octmidi</span>
<span class="c1">; velocity is mapped to brightness</span>
i<span class="n">brite</span> <span class="nb">ampmidi</span> <span class="mi">4</span>
<span class="c1">; Map an exponential envelope for the amplitude.</span>
k<span class="n">env</span> <span class="nb">expon</span> <span class="mf">.8</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> <span class="mf">.01</span>
a<span class="n">sig</span> <span class="nb">hsboscil</span> k<span class="n">env</span><span class="p">,</span> i<span class="n">tona</span><span class="p">,</span> i<span class="n">brite</span><span class="p">,</span> i<span class="n">base</span><span class="p">,</span> gi<span class="n">wave</span><span class="p">,</span> gi<span class="n">blend</span><span class="p">,</span> i<span class="n">octcnt</span>
<span class="nb">outs</span> a<span class="n">sig</span><span class="p">,</span> a<span class="n">sig</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">i</span> <span class="mi">1</span> <span class="mi">0</span> <span class="mi">30</span> <span class="c1">; play for 30 seconds</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="idm281472925198232"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Peter Neubäcker</td>
</tr>
<tr>
<td>Munich, Germany</td>
</tr>
<tr>
<td>August, 1999</td>
</tr>
</table>
<p>
</p>
<p>New in Csound version 3.58</p>
</div>
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