Thanks for your response. I tried to apply the branching principal using the equation from the [exact-ead~] by having the envelope go to 1 and then to 2 instead of 0, using min 1 and max 1 to create a branch, using an expression to convert the ascending numbers over 1 into descending numbers under 1, and then jumping to 0. I think the problem is that, during the switches, two 1s are sent at the same time, leading to a 2 (as seen in the graph), where I actually need a 0...<br>
<br>-Stephan<br><br><div class="gmail_quote">On Mon, May 30, 2011 at 8:34 PM, Andy Farnell <span dir="ltr"><<a href="mailto:padawan12@obiwannabe.co.uk">padawan12@obiwannabe.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<br>
<br>
<br>
You might be able to easily get that behaviour by<br>
quickly editing the example I gave you.<br>
<br>
The maths is really geometry.<br>
<br>
There are a few things that can be done as time domain<br>
transforms when thinking about envelopes and suchlike<br>
in this way.<br>
<br>
1) Flip it around zero with [*~ -1]<br>
2) Invert arithmetically wrt 1.0 using [sig~ 1][-~]<br>
3) Get the [min~] or the [max~] wrt another value<br>
4) Clamp at a value using [clip~] ... is special case of (3)<br>
5) Shift by an amount using [-~] or [+~]<br>
6) Scale by some factor with [*~]<br>
<br>
IIRC the idiom for a two stage envelope like that is<br>
to use [min~]/[max~] to create a split point and treat<br>
each of the two branches differently (you can do piecewise<br>
waveform construction the same way).<br>
<br>
If you want time symmetry then have the [vline~] go to 1.0<br>
and back to [0.0] and just use one of the branches.<br>
<br>
<br>
<br>
On Mon, 30 May 2011 18:45:55 +0200<br>
<div><div></div><div class="h5">Stephan Elliot Perez <<a href="mailto:dreamoftheshoreofanotherworld@gmail.com">dreamoftheshoreofanotherworld@gmail.com</a>> wrote:<br>
<br>
> Greetings,<br>
> Thank you for your responses. I tried your suggestion, hardoff, and<br>
> the result is the attached [ead-reverse~]. Unfortunately, the expression<br>
> behaves differently with this [vline~]-construction as with the [phasor~].<br>
> Here, if 1 is entered into the right input of [expr~], the result is an<br>
> envelope whose steepness becomes exponentially smaller while ascending and<br>
> exponentially greater while descending (if near 0, the opposite form is<br>
> produced and values between 1 and 0 produce a divided, confused form). I<br>
> however wish to produce an envelope that becomes exponentially steeper both<br>
> ascending and descending.<br>
> My problem with this [expr~] as well as with Mr. Farnell's patches is<br>
> that I do not quite understand the math behind them. Any ideas?<br>
><br>
> Best regards,<br>
> Stephan Elliot Perez<br>
><br>
><br>
> On Fri, May 27, 2011 at 5:54 PM, hard off <<a href="mailto:hard.off@gmail.com">hard.off@gmail.com</a>> wrote:<br>
><br>
> > instead of the [phaser~], send a [line~] (or [vline~]) signal.<br>
> ><br>
> > for example:<br>
> ><br>
> > [1, 0.5 500, 0 1000 500(<br>
> > |<br>
> > [vline~]<br>
> ><br>
> ><br>
> > like most of my patches, i don't think i originally made that one, someone<br>
> > else posted it, and i just copied. ;)<br>
> > must have been a long time ago though, cos i barely remember it.<br>
> ><br>
> ><br>
> ><br>
> ><br>
> > On Sat, May 28, 2011 at 12:24 AM, Stephan Elliot Perez <<br>
> > <a href="mailto:dreamoftheshoreofanotherworld@gmail.com">dreamoftheshoreofanotherworld@gmail.com</a>> wrote:<br>
> ><br>
> >> Greetings,<br>
> >> I wish to produce a wave form with the opposite form of the normal<br>
> >> ead~ wave (the curves become exponentially steeper instead of flatter),<br>
> >> which I can achieve by entering a negative number into the phasor in hard<br>
> >> off's exact-ead~ patch, which I downloaded from the archive. However, I<br>
> >> still want to be able to independently change the length of the ascent,<br>
> >> decline, and distance between waves as is possible with ead~. Does anyone<br>
> >> know how I could do this, or possibly have access to an abstraction-version<br>
> >> of ead~?<br>
> >><br>
> >> Best regards,<br>
> >> Stephan<br>
> >><br>
> >><br>
> >><br>
> >> _______________________________________________<br>
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> >><br>
> >><br>
> ><br>
<br>
<br>
</div></div><div class="im">--<br>
Andy Farnell <<a href="mailto:padawan12@obiwannabe.co.uk">padawan12@obiwannabe.co.uk</a>><br>
<br>
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