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Modular Diary

A further detail on Schmitt triggers: Reading in the Wikipedia article that “a Schmitt trigger can be converted into a latch and a latch can be converted into a Schmitt trigger” made me realize that the ARC Threshold Logic Neuron could be used as a Schmitt trigger. The ‘single-bit’ configuration allows for the threshold and memory properties to be incorporated in one element, as in some of the analogue circuits, rather than separating them into distinct elements as with a flip-flop or sample and hold.

I put together a little example in Audulus.

Modular Diary

…what a Schmitt trigger does is it takes a kind of wavy analog signal and turns it into a sharp digital signal
@TomWhitwell On The History Of Synthesizers

Since piecing together a Schmitt Trigger in Audulus yesterday it’s been interesting to read a little about the various ways in which the basic idea can be implemented. Upper and lower threshold triggers combined with a sample and hold seemed to be the simplest way to go with Audulus, but the Wikipedia article also covers the many ways in which it might be implemented with analogue components.

As with the ARC Threshold Logic Neuron it’s interesting to look at the history of its development and origins in the study of biological processes. Tom Whitwell, in his talk On The History Of Synthesizers, assigns this humble device a central role in the development of not just electronic music, but electronics in general.

Modular Diary

I came across Analogue Research’s Artificial Neural Network Eurorack module last year, and have been wanting to re-create some of the submodules in Audulus ever since. The Audulus Library already includes modules for the standard logic gates, but there was something in the addition of thresholds to the Boolean on or off that intrigued me: ARC provides a nice explanation, in both their video and manual, of the biological model on which the Threshold Logic Neuron is based.

As DivKid covers in the final section of his video on the Joranalogue Compare 2 dual window comparator, there’s a lot of fun to be had in the combination of knobs and logic. Mylar Melodies too has some thoughts on Why Logic Modules are Ace!

Robert Syrett orginally posted the DivKid video on the Audulus forum in connection with the uWindow module he based on the Compare 2, and, since it’s a little different to the comparator, I thought it also would be worthwhile to go through the steps of putting together a Schmitt Trigger.

I’ve posted my versions of the ANN submodules on the Audulus forum along with some demos.

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Our space for the concert this evening.
Shadanga Duo at Kvarterhuset, Jemtelandsgade 3, Amager, Copenhagen.
kvarterhuset.kk.dk/event/shadanga-koncert

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Shadanga Duo (@jasonalder with Sofia Kayaya) concert at Kvarterhuset, Jemtelandsgade 3, Amager, Copenhagen, this evening at 19:30.
kvarterhuset.kk.dk/event/shadanga-koncert

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Rehearsing A Banch in the Path with @jasonalder and Sofia Kayaya
rdgr.me/b

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The Path to A Branch in the Path
rudigermeyer.com/words/the-path-to-a-branch-in-the-path

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Texts sometimes appear as one navigates the nodes of A Branch in the Path. Some of them have their origins in dreams that I’ve written down over the years, others were generated on metaphorpsum.com. A poetic mix that blurs the lines between what is dreamt, real, and artificial.

The blur between bot and human generated tweets has turned into a particularly gnarly problem in recent years and Oliver Reichenstein has suggested some improvements that might help us distinguish between the different kinds of content streaming through our feeds.

He also wrote a little article explaining his dislike of computer generated poetry.

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Two of the things that I had in mind when composing A Branch in the Path were Nicky Case’s XOXO Talk and his Neurons interactive explanation.
youtu.be/Zl9m0AQInBk?t=6m56s
ncase.me/neurons/
rdgr.me/b

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In A Branch in the Path, the audience and performers visit a website on their smartphones and navigate their way through a web of interrelated tones – changing from one series to another as one would change lines on a subway map.
You can try it out here: rdgr.me/b