I spent the bits of time I had today further exploring the details of STS’s Audulus Rungler. The next step was to take his new shift register design and implement it in the Audulus Blippoo I’ve been putting together. I was wondering how to best implement the looping feature of the Rungler (even though it’s not actually featured in the Blippoo) when I noticed that STS had posted his take on recreating the Benjolin – in which he implements that feature beautifully!
Audulus helpfully pointed out to me that using the Audulus z-1 UnitDelay node in my Blippoo FM feedback loops would help improve the sound by processing them at audio rate. I first came across this node in the fascinating thread on non-linear filters and perhaps for that reason it stuck in my mind as a filter thing. The tip on using the UnitDelay was a good reminder that the Hordijk cicuits make good use of the blurred line between both oscillators and filters as (potentially chaotic) feedback systems.