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<div>> cool, but I only see 1 exponential parameter for all lines.</div>
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<div>then look closer ;-) the shape given as creation argument applies to all segments, but you can also set the shape for each segment, e.g.: sending [100 exp 4( to the third inlet will create a 100 ms decay segment with a fast rising exponential curve.</div>
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<div>> and its minimum value is "1".</div>
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<div>it certainly isn't, "exp -4" works as expected.</div>
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<div>Christof</div>
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<div style="margin:0 0 10px 0;"><b>Gesendet:</b> Sonntag, 14. Juli 2019 um 01:40 Uhr<br/>
<b>Von:</b> "Alexandre Torres Porres" <porres@gmail.com><br/>
<b>An:</b> "Christof Ressi" <christof.ressi@gmx.at><br/>
<b>Cc:</b> Pd-List <pd-list@lists.iem.at><br/>
<b>Betreff:</b> Re: Re: [PD] best non linear envelope design?</div>
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<div class="gmail_attr">Em sáb, 13 de jul de 2019 às 05:40, Christof Ressi <<a href="mailto:christof.ressi@gmx.at" onclick="parent.window.location.href='mailto:christof.ressi@gmx.at'; return false;" target="_blank">christof.ressi@gmx.at</a>> escreveu:</div>
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<div>Hey,</div>
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<div>> I actually know of two other adsr envelopes out there for Pd, both non linear, they are: bsaylor/aenv~ and creb/eadsr~ - both are hardcoded.</div>
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<div>attached you'll find my own personal envelope generator (cadsr~) which allows you to set the shape individually for each segments.</div>
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<div>cool, but I only see 1 exponential parameter for all lines.</div>
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<div>Exponential segments take another argument to control the shape ( >0 fast rise, <0 slow rise).</div>
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<div>and its minimum value is "1".</div>
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<div>For a "natural" envelope generator, like those found in analog synthesizers, you can use a 1-pole lowpass filter and change the frequency for each segment to emulate the behavior of a capacitor.</div>
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<div>I see, makes total sense.</div>
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<div>with 5 time constants, the envelope generator will reach 99.3% of the target value. Note that the target value is always approached asymptotically and - at least in theory - never fully reached.</div>
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<div>I see, so that's what asymptotic means then. The bsaylor/aenv~ object says it's asymtotic, so I bet it uses the same 1-pole design (I'm yet to check the code). Anyway, I was able to make envgen~ get to a pretty close curvature to your patch with a time value of "5". I used an exponential value of 4 and that did fit reasonably well. I don't thin the difference is perceivable in any significant way. So I guess I'm going with that approach to the design of my hardcoded adsr~ exponential setting.</div>
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<div>Thanks</div>
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