Here is something I made up. Don&#39;t know if it&#39;s usefull to anyone, but here it is anyway...<br><br>&lt;CsoundSynthesizer&gt; <br><br>&lt;CsOptions&gt; <br>&lt;/CsOptions&gt; <br>&nbsp;<br>&lt;CsInstruments&gt; <br>&nbsp;&nbsp;&nbsp; <br>
&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; opcode cps2midi, k, k<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>kcps&nbsp;&nbsp;&nbsp; xin<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; xout&nbsp;&nbsp;&nbsp; logbtwo(kcps / 440) * 12 + 69<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; endop <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; opcode keytrack, k,kki<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>kcps, kcutoff, ikeytrack xin
<br><br>kmidi&nbsp;&nbsp;&nbsp; cps2midi&nbsp;&nbsp;&nbsp; kcps<br>kmidi&nbsp;&nbsp;&nbsp; =&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; kmidi-64<br><br>kkey&nbsp;&nbsp;&nbsp; =&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; 2^(kmidi/12)*kcutoff<br>kscaled&nbsp;&nbsp;&nbsp; =&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; (kkey-kcutoff)*ikeytrack+kcutoff&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; xout&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; kscaled
<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; endop<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; instr 1<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>kcps&nbsp;&nbsp;&nbsp; &nbsp; =&nbsp;&nbsp;&nbsp; cpspch(p4)<br>kcutoff&nbsp;&nbsp;&nbsp; &nbsp; =&nbsp;&nbsp;&nbsp; 440<br>ikeytrack = 0.5<br><br>kcutoff&nbsp;&nbsp;&nbsp; keytrack kcps, kcutoff, ikeytrack<br><br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; printks &quot;%f&quot;, 1, kcutoff
<br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; endin<br>&nbsp;&nbsp;&nbsp; <br>&nbsp;&nbsp;&nbsp; <br>&lt;/CsInstruments&gt; <br>&nbsp;<br>&lt;CsScore&gt;<br><br>i1 0 1 7.09<br>&nbsp;&nbsp;&nbsp; <br>&lt;/CsScore&gt; <br>&lt;/CsoundSynthesizer&gt;<br>