[sdiy] 20ms delay? analog allpass filter?

[René Schmitz]

On 08.02.2023 22:39, David G Dixon wrote:
> Fair enough, but it's fairly straightforward to achieve scanning crossfade
> with analog.
Yes, I thought you were asking why it's not switching.

I guess one can say that in the 1930s Hammond did a mechanical way, 
because that was doable.

While an electronic way wasn't practical. Maybe there are 4 or 8 way 
beam deflection tubes that crossfade?


Best,

  René


> -----Original Message-----
> From: René Schmitz [mailto:synth at schmitzbits.de]
> Sent: Wednesday, February 08, 2023 4:58 AM
> To: David G Dixon;synth-diy at synth-diy.org
> Subject: Re: [sdiy] 20ms delay? analog allpass filter?
>
> [CAUTION: Non-UBC Email]
>
> HI David,
>
> On 08.02.2023 00:12, David G Dixon wrote:
>> That's cool, but why not use a 4-bit counter and a 16-channel digital
>> switch?
>>
> Because that would be hard switching, while the scanner does a crossfade
>
> (plus some high pass action) as the rotor plates move over the stator
> plates.
>
> The whole thing is a complex variable capacitor.
>
>
> Best,
>
>    René
>
>
> --
> synth at schmitzbits.de
> http://schmitzbits.de
>
>

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