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Eurorack Knob Idea

(mitxela.com)
311 points po | 2 comments | 25 Apr 25 13:19 UTC | HN request time: 0.525s | source
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bondarchuk ◴[25 Apr 25 14:06 UTC] No.43793707[source]▶
>It's a nice dream, of a synthesizer where any knob can be pulled out and replaced with a patch cable, and any jack can have a knob plugged into it to set it to a fixed value.

What's even better, though, is a coupled knob + jack where the knob turns into an attenuator for the input when a cable is plugged in, and works as a standalone knob otherwise. I think this is quite a common design.

I believe I've also seen patch cables with built-in attenuators.

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kennywinker ◴[25 Apr 25 16:18 UTC] No.43795371[source]▶
Another common pattern is jack + offset. The most useful is when you have jack + offset + attenuator… but most modules pick one or the other for space reasons.
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1. BlandDuck ◴[25 Apr 25 17:11 UTC] No.43796120[source]▶
Totally. Also, an attenuator is easier and cheaper to implement, because it just requires normalizing V+ into the jack plug. An offset requires an adder.

My preference is: attenuator < offset < attenuator + offset. I see no benefit of having to remove the knob to get to the jack as proposed in the article.

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2. nine_k ◴[25 Apr 25 21:04 UTC] No.43798503[source]▶
The benefit is saving space. Imagine a 10x10 grid of such jack / knob inputs.