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<a id="tabifd"></a>
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<h2>
<span class="refentrytitle">tabifd</span>
</h2>
<p>tabifd —
Instantaneous Frequency Distribution, magnitude and phase analysis.
</p>
</div>
<div class="refsect1">
<a id="idm281472882035080"></a>
<h2>Description</h2>
<p>
The tabifd opcode takes an input function table and performs an Instantaneous Frequency,
magnitude and phase analysis, using the STFT and tabifd (Instantaneous Frequency Distribution),
as described in Lazzarini et al, "Time-stretching using the Instantaneous Frequency Distribution and Partial
Tracking", Proc.of ICMC05, Barcelona. It generates two PV streaming signals, one containing the
amplitudes and frequencies (a similar output to pvsanal) and another containing amplitudes and
unwrapped phases.
</p>
</div>
<div class="refsect1">
<a id="idm281472881992072"></a>
<h2>Syntax</h2>
<pre class="synopsis">ffr,fphs <span class="command"><strong>tabifd</strong></span> ktimpt, kamp, kpitch, ifftsize, ihopsize, iwintype,ifn</pre>
</div>
<div class="refsect1">
<a id="idm281472881990040"></a>
<h2>Initialization</h2>
<p>
<span class="emphasis"><em>ifftsize</em></span> -- FFT analysis size, must be power-of-two and integer multiple of the hopsize.
</p>
<p>
<span class="emphasis"><em>ihopsize</em></span> -- hopsize in samples
</p>
<p>
<span class="emphasis"><em>iwintype</em></span> -- window type (O: Hamming, 1: Hanning)
</p>
<p>
<span class="emphasis"><em>ifn</em></span> -- source function table
</p>
</div>
<div class="refsect1">
<a id="idm281472881985816"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>ffr</em></span> -- output pv stream in AMP_FREQ format
</p>
<p>
<span class="emphasis"><em>fphs</em></span> -- output pv stream in AMP_PHASE format
</p>
<p>
<span class="emphasis"><em>ktimpt</em></span> -- time point (in secs) to read from
table (if less than 0 or bigger than table length, it will wraparound)
</p>
<p>
<span class="emphasis"><em>kamp</em></span> -- amplitude scaling
</p>
<p>
<span class="emphasis"><em>kpitch</em></span> -- pitch scaling (transposition)
</p>
</div>
<div class="refsect1">
<a id="idm281472881980648"></a>
<h2>Examples</h2>
<p>
Here is an example of the tabifd opcode. It uses the file <a class="ulink" href="examples/tabifd.csd" target="_top"><em class="citetitle">tabifd.csd</em></a>.
</p>
<div class="example">
<a id="idm281472881978872"></a>
<p class="title">
<strong>Example 973. Example of the tabifd 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="idm281472703589400"></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 tabifd.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">1</span>
<span class="vg">nchnls</span><span class="o">=</span><span class="mi">1</span>
<span class="kd">opcode</span> <span class="nf">TrackPlay</span><span class="p">,</span> <span class="kt">a</span><span class="p">,</span> <span class="kt">kkiiii</span>
k<span class="n">time</span><span class="p">,</span>k<span class="n">thr</span><span class="p">,</span>i<span class="n">siz</span><span class="p">,</span>i<span class="n">hsiz</span><span class="p">,</span>i<span class="n">fcos</span><span class="p">,</span>i<span class="n">fn</span> <span class="nb">xin</span>
i<span class="n">del</span> <span class="o">=</span> i<span class="n">siz</span><span class="o">-</span>i<span class="n">hsiz</span><span class="o">*</span><span class="p">(</span>i<span class="n">siz</span><span class="o">/</span><span class="p">(</span><span class="mi">2</span><span class="o">*</span>i<span class="n">hsiz</span><span class="p">)</span><span class="o">-</span><span class="mi">1</span><span class="p">)</span>
<span class="n">ffr</span><span class="p">,</span><span class="n">fphs</span> <span class="nb">tabifd</span> k<span class="n">time</span><span class="p">,</span><span class="mi">10000</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span> i<span class="n">siz</span><span class="p">,</span> i<span class="n">hsiz</span><span class="p">,</span> <span class="mi">1</span><span class="p">,</span> i<span class="n">fn</span>
<span class="n">ftrk</span> <span class="nb">partials</span> <span class="n">ffr</span><span class="p">,</span> <span class="n">fphs</span><span class="p">,</span>k<span class="n">thr</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">500</span>
a<span class="n">out</span> <span class="nb">tradsyn</span> <span class="n">ftrk</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span> <span class="mi">500</span><span class="p">,</span> i<span class="n">fcos</span>
<span class="nb">xout</span> a<span class="n">out</span>
<span class="kd">endop</span>
<span class="kd">instr</span> <span class="nf">1</span>
<span class="nb">p3</span> <span class="o">=</span> <span class="nb">ftlen</span><span class="p">(</span><span class="mi">2</span><span class="p">)</span><span class="o">/</span><span class="vg">sr</span>
k<span class="n">time</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="nb">p3</span>
a<span class="n">res</span> <span class="nf">TrackPlay</span> k<span class="n">time</span><span class="p">,</span> <span class="mf">0.003</span><span class="p">,</span><span class="mi">2048</span><span class="p">,</span><span class="mi">256</span><span class="p">,</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span>
<span class="nb">outs</span> a<span class="n">res</span>
<span class="kd">endin</span>
<span class="nt"></CsInstruments></span>
<span class="nt"><CsScore></span>
<span class="nb">f</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">16384</span> <span class="mi">9</span> <span class="mi">1</span> <span class="mi">1</span> <span class="mi">90</span>
<span class="nb">f</span><span class="mi">2</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">1</span> <span class="s">"fox.wav"</span> <span class="mi">0</span> <span class="mi">0</span> <span class="mi">1</span>
<span class="nb">i</span><span class="mi">1</span> <span class="mi">0</span> <span class="mi">1</span>
<span class="nt"></CsScore></span>
<span class="nt"></CsoundSynthesizer></span>
</pre>
</div>
</div>
</div>
<p><br class="example-break" />
</p>
<p>The example above shows the tabifd analysis feeding into partial tracking andcubic-phase additive resynthesis with pitch shifting.</p>
</div>
<div class="refsect1">
<a id="idm281472881974056"></a>
<h2>Credits</h2>
<p>
</p>
<table border="0" summary="Simple list" class="simplelist">
<tr>
<td>Author: Victor Lazzarini</td>
</tr>
<tr>
<td>Aug 2015 </td>
</tr>
</table>
<p>
</p>
<p>New plugin in version 6</p>
<p>Aug 2015</p>
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