# Noob Question Simple Envelope Generator

**URL:** <https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876>\
**Category:** DIY STUFF\
**Created:** [May 13, 2020, 11:43pm UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876 "2020-05-13T23:43:46Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![dsorce](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dsorce/32/2580_2.png) [@dsorce](https://lookmumnocomputer.discourse.group/u/dsorce)\
**Post date:** [May 13, 2020, 11:43pm UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/1 "2020-05-13T23:43:46Z")

</div>

I came across this beautiful thing

> **[STUFF - LOOK MUM NO COMPUTER](https://www.lookmumnocomputer.com/projects#/simple-envelope-generator)**
>
> Click on the images for more info on the projects, this is a work in progress and will build on the pages as i go.

  
 ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/b/be1bbe0cc7f910615ebbba653043fc0e0a12aae9.jpeg)  
i thought this is ALMOST what i want to need

But i what i would love to do is use an audio signal rather than a modular one.

i would love to use it in this kind of chain  
drone synth ▶ simple envelope generator ▶ delay pedal  
does any one know how i could mod this build to take a line level signal.

---

<div class="post-metadata">

**Author:** ![ChristianBloch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/christianbloch/32/56_2.png) [@ChristianBloch](https://lookmumnocomputer.discourse.group/u/ChristianBloch)\
**Post date:** [May 13, 2020, 11:53pm UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/2 "2020-05-13T23:53:09Z")

</div>

Sounds like what you want is an envelope follower. Control voltage, which is what this circuit is meant for, is fundamentally different from an audio signal. What are you wanting it to do with the drone synth? If you are looking to alter the volume according to a triggered envelope, then this one plus a VCA is what you want, but you need a way to trigger it. If you don’t have a trigger sequencer, you’d need to build the version that has a button so you can trigger it manually.

---

<div class="post-metadata">

**Author:** ![dsorce](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dsorce/32/2580_2.png) [@dsorce](https://lookmumnocomputer.discourse.group/u/dsorce)\
**Post date:** [May 14, 2020, 12:28am UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/3 "2020-05-14T00:28:19Z")

</div>

> [@ChristianBloch](#):
>
> looking to alter the volume according to a triggered envelope

this is correct Christian thanks for your reply!

I basically want a transform mute button like the ones i remember seeing on old Gemini mixers but with the added control of attack and decay

---

<div class="post-metadata">

**Author:** ![dsorce](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dsorce/32/2580_2.png) [@dsorce](https://lookmumnocomputer.discourse.group/u/dsorce)\
**Post date:** [May 14, 2020, 4:02pm UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/4 "2020-05-14T16:02:38Z")

</div>

So then is the drone synth audio being fed into the vca and the Envelope generator controls the vca?

---

<div class="post-metadata">

**Author:** ![ChristianBloch](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/christianbloch/32/56_2.png) [@ChristianBloch](https://lookmumnocomputer.discourse.group/u/ChristianBloch)\
**Post date:** [May 14, 2020, 6:13pm UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/5 "2020-05-14T18:13:08Z")

</div>

That is exactly right!

---

<div class="post-metadata">

**Author:** ![twinturbo](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@twinturbo](https://lookmumnocomputer.discourse.group/u/twinturbo)\
**Post date:** [May 15, 2020, 6:16am UTC](https://lookmumnocomputer.discourse.group/t/noob-question-simple-envelope-generator/876/6 "2020-05-15T06:16:39Z")

</div>

Yes, you feed the  
Audio to the “VCA” Audio IN,  
A Triger to Gate IN on the “AR” Generator  
EnvOut to the “VCA” CV IN

So when you activate Gate IN, the Envelope generator begins to increase the output voltage going to the CV In on the VCA and thus increasng the amplification.

Rob