I’m working on Karl [https://www.veloursdevices.com], a MIDI controller. It’s quite unique because it features 32 encoders over a display, which allows you to have a fully customizable interface—like a touchscreen, but with actual knobs you can touch.

I have a software engineering background, and I’ve been working on this for nearly 3 years now! I used to play with the Electra One controller before, but having the encoders over the display is really something I’ve always wanted.

I presented Karl last month at Superbooth (a fair in Berlin) and got really good feedback. After 6 months of beta and 2 years of touring with it myself, the first batch will be dispatched in August, and this is quite exciting!

Wow! Never seen "encoders over a display" before. This could be revolutionary in so many different scenarios beyond MIDI controllers. First scenario that comes to mind are car user interfaces. Mixing screens with physical controllers is such an innovative idea. Thanks for sharing.

Thanks a lot!

Yes, the first idea that came to mind (after music/light controllers) was indeed car user interfaces.

Maybe some cool interfaces for home automation too, and I can also imagine controllers for factories or workshops—pretty much anywhere with lots of parameters to control.

But really, if you have other scenarios in mind, please share, I’m very interested, as you can imagine ;)

The Ford Mustang Mach-E has a physical wheel on its touch screen.

I'm building a MIDI controller that has knobs (rotary encoders) displayed on top of a full hd display. I looked everywhere for something similar and I'm pretty sure that it does not exist. Did my first gig with the first prototype. It's basically a mix between the Electra One, the MP Midi Controller and the Stream Deck.

I'm working on this for months now, and I had to learn how to use tools like Fusion 360 and Kicad for this, which is incredibly fun!

I'm looking for a name for this product, current propositions are "a screen with holes" and "écran total" but ideas are welcome :)

Such a fan of rotary encoders, building a hardware Sonos controller with them now

midimiddle (im picturing knobs _through and over_ the screen)

Could you generalize to other identities ?

Or, on the contrary, give an example of such equation with some actual empirical value ?

Well, at least the GDP identity is an accounting identity, so it has some value, but the causal relationships are not there.

Every mathematical statement is a tautology (in that they are inevitable conclusions logically derived from a set of axioms). If the axioms constitute a decent abstraction of reality, then you can try to test causal relationships uncovered by logic, or use them in practical ways (Euclidean geometry, Newton's laws etc).

You can read Kaya's identity as per capita CO2 emissions from human sources is equal to per capita GDP times energy use per GDP unit times CO2 emissions per energy unit production. So, you have three ways of reducing per capita CO2 emissions if you are a global central planner (pushing aside the miserable implications of having a global central planner): 1) reduce living standards; 2) use energy more efficiently; and 3) generate less CO2 when producing energy.

And, if all you care about is reducing total CO2 emissions, start culling people or reduce the birth rate. This appeals to the 1970s neo-Malthusian, "the world is going to run out of food" crowd cause they make a living selling catastrophe. Combined with neo-Marxists who like to emphasize distribution much more than the absolute level of wealth, they like to ignore how living standards have improved[1] contemporaneously with increased CO2 emissions.

[1]: https://www.vox.com/the-big-idea/2016/12/23/14062168/history...

Thank you again for this answer.

What I really don't understand here is the transition between :

1 - You can read Kaya's identity as per capita CO2 emissions from human sources is equal to per capita GDP times energy use per GDP unit times CO2 emissions per energy unit production.

and

2 - So, you have three ways of reducing per capita CO2 emissions...

What is the logic behind this ? I mean, if you pose [ CO2 = CO2/pop * pop ] (simplified, but indeed always true by definition), how can you say that one way of reducing the CO2 emissions is reducing the [pop] term ?

I don't know if I'm clear enough...

> What is the logic behind this?

I guess my disdain for this kind of approach was not obvious.

I mean, since most of Tag Managers solutions let 3rd Parties set cookies, ads companies such as Criteo (for instance) must use them to trace users across several websites, no ?

What kind of other solution do you think about ?

You can set the cookies but that doesn't mean the browser won't remove them, or a ad-blocker prevent them from being set in the first place. I'm saying if you want something that always works, cookies likely aren't it.

You could do something like an iFrame, with the parent site passing information to the frame. Here's an example: https://medium.com/building-contently/tracking-people-across...

Thanks a lot. Very interesting link.

Same question: this iFrame would be used to store information related to the user across websites, it kind of works like a cross-domain-cookie-replacement : could GDPR make these kind of tooling illegal ? Should we display a very specific popup to tell the user what those scripts really do ? And have an opt-out option ?

Depends a lot about the data you are collecting I suppose. Not a Lawyer, don't know the use case. Can't really venture a guess on where it'd fall.

It could make this illegal for sure. On your second point, remember GDPR requires opt-in.