[sdiy] 20ms delay? analog allpass filter?

[René Schmitz]

Hi Neil and all,

On 07.02.2023 04:18, Neil Harper via Synth-diy wrote:
> hey everyone,
> I've been messing around with some digital stuff, where it's really 
> easy to make delays to do accurate karplus-strong type sounds for 
> example.
>
> Anyways, it got me wondering if there's any analog equivalent? Let's 
> say I want a 20ms delay, is that in the realm of requiring a dedicated 
> IC to do the delay, or is that possible with bog standard electronic 
> parts like opamps and capacitors? 2
>
>
Easy, you just need one component:

A couple thousand kilometers of coax cable should do the trick. :)


Or make a transmission line instead from lumped components.

Like the one used in Hammond organs for the Scanner Vibrato.

https://modularsynthesis.com/modules/DJB-scanner/scanner.htm


Best,

  René


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