From d94f52c5f1c7025357c52e59a88acdf0f97f8f83 Mon Sep 17 00:00:00 2001 From: Jessica Stanley <jessica.g.stanley@gmail.com> Date: Thu, 27 Jun 2019 17:00:14 +0000 Subject: [PATCH] Delia image added --- docs/projects/02learn.md | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/docs/projects/02learn.md b/docs/projects/02learn.md index d53a662..34cadb8 100644 --- a/docs/projects/02learn.md +++ b/docs/projects/02learn.md @@ -12,6 +12,7 @@ There are many many types of synthesizer out there. Just look at how many Legowe <iframe width="560" height="315" src="https://www.youtube.com/embed/fyMZ2vV0zqg" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe> + ## Analog What's analog about an analog synth? Finding a simple and easy way to explain this is something I still haven't mastered, and this quest has taken me down a bit of an an electronics and signal processing rabbit hole. So for now let me point you in the direction of [this Sparkfun explanation of digital and analog signals](https://learn.sparkfun.com/tutorials/analog-vs-digital/digital-signals) and [this other one one digital and analog circuits](https://learn.sparkfun.com/tutorials/analog-vs-digital/analog-and-digital-circuits). @@ -32,6 +33,7 @@ Or you could create an elaborate Rube Goldberg machine out of various different Building digital synths requires coding and less hands-on electronics, and analog synths require zero coding but lots and lots of different components. There's much debate about which is the superior form of sound synthesis, but for me personally I found it satisfying to create circuits the analog way. I've written more about my decision to go the analog route in my [project diary](https://class.textile-academy.org/2019/jessica.stanley/projects/project_diary/week01/) + ## Modular Probably the simplest part to understand, 'modular' means that Stitch Synth is made of separate parts, or modules, that connect together. Modular synths have been around since the 1960s, and are still in use today. Classic modular synths use patch cables (the coloured wires in the image below) to connect inputs and outputs of different modules together - personally I'm a big fan of the 'big mess of wires' aesthetic, but it is also pretty complex, and totally bewildering for newcomers to modular synthesis. @@ -73,6 +75,7 @@ Every synthesizer needs an oscillator. An oscillator is a circuit that takes a s *gif by [William J Mullin](http://www.ablongman.com/mullin/AnimationPages/FigsVII-15.html)* + ## Wendy: the NOT gate  @@ -92,18 +95,22 @@ I experimented with lots of different soft resistors and capacitor values when d ## Delia: the phase-locked loop + The Delia oscillator uses a chip that's a little more complex than the Wendy. Again I'm going to send you to [Logic Noise](https://hackaday.com/2015/08/07/logic-noise-4046-voltage-controlled-oscillator-part-one/) to properly understand how it works, as Elliot Williams has already done a great job of explaining this. The Delia module's circuit is exactly the same as the one Logic Noise shows you how to build on a breadboard, and I designed the Anni module to work with it. + # Interactive modules Four of the modules allow you to play Stitch Synth by touching them. Here's how they work. + ## Ada  Ada has two strips of conductive material woven into it (the black squares in the diagram above). One strip connects to the input of an oscillator in the Wendy module, and the other connects to the output of that oscillator. When you touch both sides at the same time, current flows (via you) through the circuit and sound is created! How hard you press on the fabric strips, or how much skin you use to touch them (the tip of a finger vs a whole hand, for example) affects the tone - the harder you press, the higher the pitch. + ## Maryam  -- GitLab