[sdiy] Frequency shifted from BBD?

[Florian Anwander]

There was the tape based solution, invented in the 1920s. (see 
https://valhalladsp.com/2010/05/04/pitch-shifters-pre-digital/) I 
remember a photo from the WDR Electronic Music Studio, where Karl Heinz 
Stockhausen used one, which had 12(?) playback heads on a rotating 
plate. But I don't find the picture at the moment.

Am 06.10.24 um 20:44 schrieb Tom Wiltshire:
> At the time that this was a tough problem, people were trying to solve 
> "the pitchshifting problem" using entirely analogue means. The problem 
> didn't really get solved
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