Browser Based Lunetta - State Machine

[passepartoutduo]

Hi everyone!

It's my first post here - but Lunetta and this forum has been a big inspiration to me! A couple years back I put together a little CMOS synth with a bunch of logic circuits:



Since then, I've made a synth you can play in your browser called State Machine - it's a patching environment where the modules mainly emulate CMOS 4000 series chips.

Feel welcome to check it out here: https://passepartoutduo.com/state-machine

Let me know what you think - if there are bugs, a module you think should be included, etc. please tell me about it!



You can click the info icon to get some relevant info about the module, and also a mention of the analogous hardware - so most things patched up here could be easily made in hardware too.



You can also check out example patches in the file browser

[blue hell]

Oh, cool, nice idea, and

I'll mark this post as unread - to check things out later - maybe to get some build ideas myself too

[Cynosure]

I love this! Thank you so much for sharing it.

[PHOBoS]

very nice work!

and now that I found night mode (I see it's a lightbulb/moon combo, and not an enlightened duck) I can actually read it,
though my monitor is a bit too small for this kind of stuff.

as for missing modules; a euclidean generator is always fun and a BCD to 7-segment decoder can also be quite useful,
you could even add an 'LED display' to it.

[passepartoutduo]

Thanks so much for checking it out!

Yes a 7-segment decoder and display would be great! I'll give it a go sometime soon

I think the euclidean generator is the type of thing that you could put together with existing modules and save as a snippet (Ring counters, binary counters + some logic should get you pretty close!)

[Cynosure]

What about pots that you can use as voltage dividers or for volume control? Then you could create a sequencer.

Maybe a filter too - even if it's just 6dB/octave. It would help tone down the bright square waves.

[passepartoutduo]

Yeah! So regarding the volume + filters: basically I decided early on that I want to keep it really 'pure binary' in the sense that the output is always going to be 0s and 1s - but actually there is still some volume control and filters.

If you go into performance mode (knob icon in the top right) you'll have access to the oscillators and buttons of your patch in a big interface (you can assign different ones), and also a global filter and delay effect, just to give some space and mellow out the sound if desired. You can keep the filters and delay as you patch if the 'fx link' toggle is on (top right in performance mode).

You have global volume, not per channel, if you hover or long tap over the audio icon.

When it comes to sequencing, it's just a slightly different idea, instead of sequencing via CV, the way to achieve a basic 8 step sequencer is to patch 8 oscillators into a multiplexer's inputs, and count through it with a binary counter for ordered sequencer, or whatever other logic for more complicated sequences.

Hope that helps and you can achieve what you're looking for! Thanks for checking it out

Happy to send over an example patch if it helps!

[Cynosure]

[passepartoutduo]

I had a go at adding the 7-segment display and decoder - it's pretty fun! It should be live on the site if you wanna try it out -

[PHOBoS]

works perfect and looks very nice too

I did notice it only counts from 0..9, you could add A..F (hex) to it so there are always some outputs active.

[passepartoutduo]

Thanks! I was thinking about it - I want to make sure there's always some hardware to back it up, so it's just copying the operation of a CD4511... But I agree that it's a bit silly not to just have A-F after.

[passepartoutduo]

Added the hex too, why not! Just note that it wouldn't work like that on a CD4511

[Ruebezahl]

Hello, I already had a lot of fun with it