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Eurorack Knob Idea

(mitxela.com)
310 points po | 2 comments | 25 Apr 25 13:19 UTC | HN request time: 0s | 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. robotresearcher ◴[25 Apr 25 17:23 UTC] No.43796260{3}[source]▶
The attenuator-inverter is super handy too. A gain knob that goes from -1 to +1 X.
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2. wbl ◴[26 Apr 25 17:43 UTC] No.43805609[source]▶
That's a neat trick. Only way I can think of to do it involves two op amp buffers, one inverting one not and take the signal from the wiper.