Comment by kennywinker

Comment by kennywinker a day ago

4 replies

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.

robotresearcher a day ago

The attenuator-inverter is super handy too. A gain knob that goes from -1 to +1 X.

  • wbl 2 hours ago

    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.

BlandDuck a day ago

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.

  • nine_k a day ago

    The benefit is saving space. Imagine a 10x10 grid of such jack / knob inputs.