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<h2>
<span class="refentrytitle">bformenc1</span>
</h2>
<p>bformenc1 —
Codes a signal into the ambisonic B format.
</p>
</div>
<div class="refsect1">
<a id="idm281472949211272"></a>
<h2>Description</h2>
<p>
Codes a signal into the ambisonic B format
</p>
</div>
<div class="refsect1">
<a id="idm281472949209928"></a>
<h2>Syntax</h2>
<pre class="synopsis">aw, ax, ay, az <span class="command"><strong>bformenc1</strong></span> asig, kalpha, kbeta</pre>
<pre class="synopsis">aw, ax, ay, az, ar, as, at, au, av <span class="command"><strong>bformenc1</strong></span> asig, kalpha, kbeta</pre>
<pre class="synopsis">aw, ax, ay, az, ar, as, at, au, av, ak, al, am, an, ao, ap, aq <span class="command"><strong>bformenc1</strong></span> \
asig, kalpha, kbeta</pre>
<pre class="synopsis">aarray[] <span class="command"><strong>bformenc1</strong></span> asig, kalpha, kbeta</pre>
</div>
<div class="refsect1">
<a id="idm281472949203064"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>aw, ax, ay, ... </em></span>
-- output cells of the B format.
</p>
<p>
<span class="emphasis"><em>aarray</em></span>
-- output array to hold cells of the B format.
</p>
<p>
<span class="emphasis"><em>asig</em></span> -- input signal.
</p>
<p>
<span class="emphasis"><em>kalpha</em></span> –- azimuth angle in degrees (anticlockwise).
</p>
<p>
<span class="emphasis"><em>kbeta</em></span> -- altitude angle in degrees.
</p>
</div>
<div class="refsect1">
<a id="idm281472949197528"></a>
<h2>Example</h2>
<p>
Here is an example of the bformenc1 opcode. It uses the file <a class="ulink" href="examples/bformenc1.csd" target="_top"><em class="citetitle">bformenc1.csd</em></a>.
</p>
<div class="example">
<a id="idm281472949195672"></a>
<p class="title">
<strong>Example 89. Example of the bformenc1 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="idm281472783755064"></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>
<span class="c1">;-odac -iadc -d ;;;RT audio I/O</span>
<span class="c1">; For Non-realtime ouput leave only the line below:</span>
-o bformenc.wav -W <span class="c1">;;; 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">8</span>
<span class="vg">0dbfs</span> <span class="o">=</span> <span class="mi">1</span>
<span class="kd">instr</span> <span class="nf">1</span> <span class="c1">;without arrays</span>
<span class="c1">; generate pink noise</span>
a<span class="n">noise</span> <span class="nb">pinkish</span> <span class="mi">1</span>
<span class="c1">; two full turns</span>
k<span class="n">alpha</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">720</span>
k<span class="n">beta</span> <span class="o">=</span> <span class="mi">0</span>
<span class="c1">; generate B format</span>
a<span class="n">w</span><span class="p">,</span> a<span class="n">x</span><span class="p">,</span> a<span class="n">y</span><span class="p">,</span> a<span class="n">z</span><span class="p">,</span> a<span class="n">r</span><span class="p">,</span> a<span class="n">s</span><span class="p">,</span> a<span class="n">t</span><span class="p">,</span> a<span class="n">u</span><span class="p">,</span> a<span class="n">v</span> <span class="nb">bformenc1</span> a<span class="n">noise</span><span class="p">,</span> k<span class="n">alpha</span><span class="p">,</span> k<span class="n">beta</span>
<span class="c1">; decode B format for 8 channel circle loudspeaker setup</span>
a<span class="n">1</span><span class="p">,</span> a<span class="n">2</span><span class="p">,</span> a<span class="n">3</span><span class="p">,</span> a<span class="n">4</span><span class="p">,</span> a<span class="n">5</span><span class="p">,</span> a<span class="n">6</span><span class="p">,</span> a<span class="n">7</span><span class="p">,</span> a<span class="n">8</span> <span class="nb">bformdec1</span> <span class="mi">4</span><span class="p">,</span> a<span class="n">w</span><span class="p">,</span> a<span class="n">x</span><span class="p">,</span> a<span class="n">y</span><span class="p">,</span> a<span class="n">z</span><span class="p">,</span> a<span class="n">r</span><span class="p">,</span> a<span class="n">s</span><span class="p">,</span> a<span class="n">t</span><span class="p">,</span> a<span class="n">u</span><span class="p">,</span> a<span class="n">v</span>
<span class="c1">; write audio out</span>
<span class="nb">outo</span> a<span class="n">1</span><span class="p">,</span> a<span class="n">2</span><span class="p">,</span> a<span class="n">3</span><span class="p">,</span> a<span class="n">4</span><span class="p">,</span> a<span class="n">5</span><span class="p">,</span> a<span class="n">6</span><span class="p">,</span> a<span class="n">7</span><span class="p">,</span> a<span class="n">8</span>
<span class="kd">endin</span>
<span class="kd">instr</span> <span class="nf">2</span> <span class="c1">;with arrays (csound6)</span>
<span class="c1">;set file names for:</span>
S<span class="n">_bform</span> <span class="o">=</span> <span class="s">"bform_out.wav"</span> <span class="c1">;b-format (2nd order) output</span>
S<span class="n">_sound</span> <span class="o">=</span> <span class="s">"sound_out.wav"</span> <span class="c1">;sound output</span>
<span class="c1">; generate pink noise</span>
a<span class="n">noise</span> <span class="nb">pinkish</span> <span class="mi">1</span>
<span class="c1">; two full turns</span>
k<span class="n">alpha</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">720</span>
k<span class="n">beta</span> <span class="o">=</span> <span class="mi">0</span>
<span class="c1">;create array for B-format 2nd order (9 chnls)</span>
a<span class="n">Bform</span><span class="p">[]</span> <span class="nb">init</span> <span class="mi">9</span>
<span class="c1">; generate B-format</span>
a<span class="n">Bform</span> <span class="nb">bformenc1</span> a<span class="n">noise</span><span class="p">,</span> k<span class="n">alpha</span><span class="p">,</span> k<span class="n">beta</span>
<span class="c1">;write out b-format</span>
<span class="nb">fout</span> <span class="s">"fout.wav"</span><span class="p">,</span> <span class="mi">18</span><span class="p">,</span> a<span class="n">Bform</span>
<span class="c1">;create array for audio output (8 channels)</span>
a<span class="n">Audio</span><span class="p">[]</span> <span class="nb">init</span> <span class="mi">8</span>
<span class="c1">;decode B format for 8 channel circle loudspeaker setup</span>
a<span class="n">Audio</span> <span class="nb">bformdec1</span> <span class="mi">4</span><span class="p">,</span> a<span class="n">Bform</span>
<span class="c1">; write audio out</span>
<span class="nb">fout</span> S<span class="n">_sound</span><span class="p">,</span> <span class="mi">18</span><span class="p">,</span> a<span class="n">Audio</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">8</span>
<span class="nb">i</span> <span class="mi">2</span> <span class="mi">8</span> <span class="mi">8</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="idm281472949191480"></a>
<h2>See Also</h2>
<p>
<a class="link" href="bformdec1.html" title="bformdec1"><em class="citetitle">bformdec1</em></a>
</p>
</div>
<div class="refsect1">
<a id="idm281472949189368"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Richard Furse, Bruce Wiggins and Fons
Adriaensen, following code by Samuel Groner</td>
</tr>
<tr>
<td>2008</td>
</tr>
</table>
<p>
</p>
<p>New in version 5.09</p>
<p>Array output new in version 6.01</p>
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