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<p class="p1"><b>PV_MagLog<span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span><span class="Apple-tab-span"> </span>log of magnitudes</b></p>
<p class="p2"><br></p>
<p class="p3"><b>PV_MagLog(buffer)</b></p>
<p class="p2"><br></p>
<p class="p3">Converts the magnitudes to their log values. No renormalisation is performed. This is primarily intended for analysis purposes, but can also be used in combination with [<span class="s1">PV_MagExp</span>] for vocoder manipulation.</p>
<p class="p2"><br></p>
<p class="p3"><b>buffer</b> - fft buffer.</p>
<p class="p2"><br></p>
<p class="p4">s.boot;</p>
<p class="p5"><br></p>
<p class="p4">(</p>
<p class="p4">b = <span class="s2">Buffer</span>.alloc(s,2048,1);</p>
<p class="p6"><span class="s3">c = </span><span class="s2">Buffer</span><span class="s3">.read(s,</span>"sounds/a11wlk01.wav"<span class="s3">);</span></p>
<p class="p4">)</p>
<p class="p5"><br></p>
<p class="p4">(</p>
<p class="p4"><span class="s2">SynthDef</span>(<span class="s4">"help-maglog"</span>, {<span class="Apple-converted-space"> </span><span class="s2">arg</span> out=0, bufnum=0, soundBufnum=2;</p>
<p class="p4"><span class="Apple-tab-span"> </span><span class="s2">var</span> in, chain;</p>
<p class="p4"><span class="Apple-tab-span"> </span>in = <span class="s2">PlayBuf</span>.ar(1, soundBufnum, <span class="s2">BufRateScale</span>.kr(soundBufnum), loop: 1);</p>
<p class="p4"><span class="Apple-tab-span"> </span>chain = <span class="s2">FFT</span>(bufnum, in);</p>
<p class="p4"><span class="Apple-tab-span"> </span>chain = <span class="s2">PV_MagLog</span>(chain);<span class="Apple-converted-space"> </span></p>
<p class="p7"><span class="s3"><span class="Apple-tab-span"> </span></span>// No effect; just convert to log and back...</p>
<p class="p4"><span class="Apple-tab-span"> </span>chain = <span class="s2">PV_MagExp</span>(chain);<span class="Apple-converted-space"> </span></p>
<p class="p4"><span class="Apple-tab-span"> </span><span class="s2">Out</span>.ar(out, 0.3 * <span class="s2">IFFT</span>(chain).poll.dup);<span class="Apple-converted-space"> </span></p>
<p class="p4">}).play(s,[<span class="s5">\out</span>, 0, <span class="s5">\bufnum</span>, b.bufnum, <span class="s5">\soundBufnum</span>, c.bufnum]);</p>
<p class="p4">)</p>
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