[sdiy] 20ms delay? analog allpass filter?

[Mikko Helin]

Even with the digital solution you don't need DSP as there are some
I2S lip sync delays you can control using a simple Arduino
microcontroller (or RPi Pico), in addition you just need a codec board
(from Ebay etc.) and that I2S delay like this one (TI's TPA5050):
https://www.ti.com/lit/ds/symlink/tpa5050.pdf?ts=1675998263024

On Thu, Feb 9, 2023 at 3:43 PM René Schmitz <synth at schmitzbits.de> wrote:
>
>
> Am 09.02.2023 um 14:18 schrieb Ben Stuyts:
>
>
> I guess one can say that in the 1930s Hammond did a mechanical way, because that was doable.
>
>
> That just reminded me that I have an old Schaller Rotor Sound which does something similar with a ton of inductors. See attached schematic.
>
>
> That looks crazy. It looks they're saturating the cores, and thus varying the delay time of the transmission line magnetically.
>
>
> Best,
>
>  René
>
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