Seeking DR envelope ideas
Kirk
kirke at bellsouth.net
Tue Nov 28 12:09:57 CET 2000
Right, that sounds like the simple AR EGs I was referring too. Someone on
the list
has kindly mentioned to me that there is no essential difference between
release and
decay. Since the input CC is essentially a gate who's level is set by midi
note on velocity,
I'm thinking all I need is the option to make this gate a pulse and release
becomes decay.
Thanks for the input,
Kirk
----- Original Message -----
From: "Scott Gravenhorst" <music.maker at gte.net>
To: <synth-diy at node12b53.a2000.nl>
Sent: Monday, November 27, 2000 7:00 PM
Subject: Re: Seeking DR envelope ideas
> Using diodes, like 1N914 or 1N4148 you can control charge
> and discharge rate with separate pots (or fixed resistors
> if no variation of attack/decay times are required).
>
> "Kirk" <kirke at bellsouth.net> wrote:
> >This is a multi-part message in MIME format.
> >
> >------=_NextPart_000_082F_01C058AE.92A255C0
> >Content-Type: text/plain;
> > charset="iso-8859-1"
> >Content-Transfer-Encoding: quoted-printable
> >
> >I'd like to add an envelope with nothing more than decay and release =
> >control to my velocity
> >sensitive VCA CV. I can find ideas for release in simple AR envelope =
> >designs but so far I'm
> >lost on the decay part. Here's part of the circuit:
> >
> >
> > ____
> > / |
> > 220K \ GND
> > / =20
> > \ 100K
> > | __/\/\/\___
> > | | |
> > | | |\ |
> > | | | \ |
> > | | | \ |
> > |___|__| _ \ |
> > | \ |
> > | \|_____________
> > | / 5-9.4 volts
> > 100K | / to sh-101 =20
> > 5vdc___/\/\/\/-+--+--| + / VCA control
> > | | | /
> >0-10v CV ___/\/\/\/-+ | | /
> >from demux 220K --- |/
> >buffer of ---
> >midi2cv8 | 22n
> >velocity CV |
> > GND
> >
> >
> >I hope this asci art is readable, if not you could try viewing it with a
=
> >fixed width
> >font like Fixedsys in MS Windows. If anyone has any ideas they could =
> >share I'd be
> >grateful.
> >
> >Thanks,
> >
> >Kirk
> >
> >
> >
> >
> >------=_NextPart_000_082F_01C058AE.92A255C0
> >Content-Type: text/html;
> > charset="iso-8859-1"
> >Content-Transfer-Encoding: quoted-printable
> >
> ><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
> ><HTML><HEAD>
> ><META content=3D"text/html; charset=3Diso-8859-1" =
> >http-equiv=3DContent-Type>
> ><META content=3D"MSHTML 5.00.2919.6307" name=3DGENERATOR>
> ><STYLE></STYLE>
> ></HEAD>
> ><BODY bgColor=3D#ffffff>
> ><DIV>
> ><DIV><FONT face=3DFixedsys>I'd like to add an envelope with nothing more
=
> >than=20
> >decay and release control to my velocity<BR>sensitive VCA CV. I can find
=
> >ideas=20
> >for release in simple AR envelope designs but so far I'm<BR>lost on the =
> >decay=20
> >part. Here's part of the circuit:</FONT></DIV>
> ><DIV> </DIV>
> ><DIV> </DIV>
> ><DIV><FONT=20
> >face=3DFixedsys> &nb=
> >sp; =20
> >____<BR> =
> >; =20
> >/ =20
> >|<BR> &n=
> >bsp; =20
> >220K \ =20
> >GND<BR> =
> > =20
> >/ <BR> =20
> > =
> >
> >\ =20
> >100K<BR> =
> >; =20
> >| =20
> >__/\/\/\___<BR> &nbs=
> >p; =20
> >| | =20
> >|<BR> &n=
> >bsp; =20
> >| | |\ =20
> >|<BR> &n=
> >bsp; =20
> >| | | \ =20
> >|<BR> &n=
> >bsp; =20
> >| | | \ =20
> >|<BR> &n=
> >bsp; =20
> >|___|__| _ \ =20
> >|<BR> &n=
> >bsp; &nb=
> >sp; =20
> >| \=20
> >|<BR> &n=
> >bsp; &nb=
> >sp; =20
> >| =20
> >\|_____________<BR> =
> > &=
> >nbsp; =20
> >| / 5-9.4=20
> >volts<BR> &nbs=
> >p; =20
> >100K | =20
> >/ to sh-101 =20
> ><BR> 5vdc___/\/\/\/-+--+--| +=20
> >/ VCA=20
> >control<BR> &n=
> >bsp; =20
> >| | | /<BR>0-10v CV ___/\/\/\/-+ | | =
> >
> >/<BR>from demux 220K --- =
> >|/<BR>buffer=20
> >of =
> >; =20
> >---<BR>midi2cv8 &nbs=
> >p; =20
> >| 22n<BR>velocity=20
> >CV =
> >;=20
> >|<BR> &n=
> >bsp; =20
> >GND</FONT></DIV>
> ><DIV> </DIV>
> ><DIV> </DIV>
> ><DIV><FONT face=3DFixedsys>I hope this asci art is readable, if not you =
> >could try=20
> >viewing it with a fixed width</FONT></DIV>
> ><DIV><FONT face=3DFixedsys>font like Fixedsys in MS Windows. If =
> >anyone has=20
> >any ideas they could share I'd be</FONT></DIV>
> ><DIV><FONT face=3DFixedsys>grateful.</FONT></DIV>
> ><DIV> </DIV>
> ><DIV><FONT face=3DFixedsys>Thanks,</FONT></DIV>
> ><DIV> </DIV>
> ><DIV><FONT face=3DFixedsys>Kirk</FONT></DIV>
> ><DIV> </DIV>
> ><DIV> </DIV>
> ><DIV> </DIV></DIV></BODY></HTML>
> >
> >------=_NextPart_000_082F_01C058AE.92A255C0--
> >
>
> -- Scott Gravenhorst : On The Edge, but the Edge of What?
> -- Linux Rex, Linux Vobiscum | RedWebMail by RedStarWare
> -- FatMan: www.teklab.com/~chordman
> -- NonFatMan: members.xoom.com/_XMCM/chordman/index.html
> -- The 21st century does NOT start in the year 2000!!!
>
>
>
>
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