Here’s the Grand Terminal from Endorphin.es and here’s my in depth demo of it. I would like to stress that although this is a long, in depth video showing a lot of the uses of the module all the basic functionality and great sound is covered right on the faceplate. It’s two function generators, two filters and an FX engine. Simple to use but there’s a lot of complexity and digital control in a one level menu that’s accessed with button holds. This stops the module being twice the HP size it is, keeps all the key controls at the front but also allows you to set the module up exactly how you want (it saves all the settings automatically on power down / power up) and then make use of all it can offer.

The Grand Terminal makes use of zero delay filters and recent DSP developments in virtual analogue filter design. This DSP can be found in products such as the U-He Diva and there’s some resources for those interested below.

ZERO DELAY FILTERS & DSP DEVELOPMENTS.

Quote from Endorphines – “with recent V2 Airways GT update, almost all GT filter types obtained so-called zero-delay nature, Zero-delay filters are recent (well, since probably 5 years) DSP researches present in quality virtual analog synths as U-he Diva or Reaktor Blocks and many more.”

“The reason these filters are so interesting (and titled Virtual Analog) is that they mathematically preserve the original analog filter topology, including (in most cases) zero-delay loops” (c)

http://www.willpirkle.com/Downloads/AN-4VirtualAnalogFilters.2.0.pdf

Also some more material about the topic from Urs Heckmann himself: https://urs.silvrback.com/zero-delay-feedback