[sdiy] Frequency shifted from BBD?

[Tom Wiltshire]

> On 7 Oct 2024, at 14:45, Todd Sines via Synth-diy <synth-diy at synth-diy.org> wrote:
> 
> The A/DA Harmony Synthesizer pedal used Reticon SAD1024 BBDs to accomplish some pretty dark pitch shifting, at least 2 were used that I can see from this listing.. that BBD artifacting shimmer is amazing.
> https://reverb.com/item/4813895-a-da-harmony-synthesizer-1979-perfect-working-order-rare <https://reverb.com/item/4813895-a-da-harmony-synthesizer-1979-perfect-working-order-rare>
> https://www.youtube.com/watch?v=l_0ZfIule5Y <https://www.youtube.com/watch?v=l_0ZfIule5Y>
> https://www.youtube.com/watch?v=RXnMgCSSRqQ <https://www.youtube.com/watch?v=RXnMgCSSRqQ>

This is exactly the "large and expensive" thing we were theorising earlier in the thread! There's a fantastic Craig Anderton quote from this Premier Guitar article looking at this pedal:

https://www.premierguitar.com/gear/inside-the-a-da-harmony-synthesizer <https://www.premierguitar.com/gear/inside-the-a-da-harmony-synthesizer>

Anderton said "“It’s amazing that this box even exists at all", which pretty much sums it up. Analogue pitchshifting is a bit like dogs riding bicycles. It's not that they do it particularly well or very elegantly, it's simply amazing that they do it at all!

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