Designing a diode ladder filter from scratch
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Channel: Moritz Klein
Views: 65,883
Rating: 4.952271 out of 5
Keywords: VCF, analog, DIY, Synth
Id: jvNNgUl3al0
Channel Id: undefined
Length: 36min 4sec (2164 seconds)
Published: Mon Mar 08 2021
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hi all,
here's the latest episode in my DIY VCF series. this time, we're building a three-pole diode ladder filter. since the topic is quite complex, i'm not going into great detail about the basics (besides diodes). so if you're just starting out, i recommend you watch the rest of my filter series first – you can find it on my channel!
thanks for watching!
Great video, and a great-sounding filter! Buuut...
That's not a ladder filter :-)
The Steiner-Parker filter - which is what you've redesigned here, and it seems a hell of a lot more stable and predictable than the original - is a Sallen-Key filter.
It's totally different from a diode ladder like an EMS or TB303 filter.
Thanks for expaining things in detail, it was very interesting, now the drum sounds make a bit more sense to me!
Did you (have to) match the diodes in the ladder?
Thanks so much for these videos. I am loving them and learning so much.
As someone who likes weird distorted sounds, I'm really curious about an even-order filter like this, with that asymmetric behavior.
Also, the problem you present in the last bit of the "Diodes as resistors?" section - why not just reduce the amplitude of the signal to be much less than the bias current? Is this just too noisy? I guess this would also have problems with CV bleed-through, but you could cancel that out, right?
Hi. Making a list on Mouser using the parts list from the video description. What are the capacitors' specs? I'm still un familiar with what I'm looking for on the Mouser site. I think film/foil, but the other specs I'm still not sure from the video.
Great Videos! Keep them up!
Another fantastic video. Nice one.
What are you sending the CV/Gate to? It sounds really good through the filter (the 303 sound)