[sdiy] 20ms delay? analog allpass filter?

[David Huss]

I would also say that long delays are hard to create in analog without a ton of signal degradation. Although for Karplus Strong that degradation might be part of what makes it sound good, so despite (or because of?) their flaws BBDs might be the way to go here.

On more precise delay uints I was always fascinated by the custom "Electrical Audio Precision Delay" units made by Eventide for Steve Albinis studio — mentioned in this thread (feel free to watch the video): <https://gearspace.com/board/high-end/1232773-eventide-electrical-audio-precision-dual-delay.html>

Nowadays DSP makes this more comfortable. On a Extron DMPS 128 audio DSP unit you can for example punch in the delay either by milliseconds, or by choosing a room temperature and a distance.

On February 7, 2023 7:57:17 AM UTC, Mattias Rickardsson <mr at analogue.org> wrote:
>Hi!
>20 ms is a lot. See the old broadcast equipment EMT 266 Transient Limiter
>for example, which has an analog delay of 0.3 ms, corresponding to 14
>samples in 48 kHz digital audio, or 10 cm of sound travelling through air.
>
>https://postimg.cc/Fk0pd2Yx
>
>So you'll likely need a BBD or something digital, I'm afraid.
>
>/mr
>
>
>
>
>Den tis 7 feb. 2023 04:19Neil Harper via Synth-diy <synth-diy at synth-diy.org>
>skrev:
>
>> 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
>>
>>
>>
>> --
>> /// Neil Harper
>> /// Every Wave is New Until it Breaks
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