Curtis chips (integrated circuits made by Curtis Electromusic Specialties) are a common component in vintage synths. Unfortunately, these chips went out of production decades ago and have become hard er and harder to find.
In June, CES announced that it was planning to re-release these rare chips in production volumes, starting with the CES 3340 VCO.
The above video, via Gregory Cox, captures a comparison of new vs old CES 3340 VCO chips, running in a Oberheim OB-8 synthesizer.
Here’s what Cox has to say about the video:
This video is a demonstration of the newly manufactured Curtis Electromusic CEM3340 oscillator IC. A comparison is achieved using the Oberheim OB-8 with half of its 3340s replaced and setting the keyboard in dual mode. Voices 1-4 are the original CEM3340s and 5-8 are the Revision Gs. By assigning the same sound to both splits in dual mode, a comparison can be made by fading between both sounds using the program balance knob.
The signal chain is OB-8 / Neutrik patch bay / Apogee Symphony / Headphone Output / Canon 5D mkiii mic input.
CES says that “there is currently no timeline or concrete plan to offer others in the Curtis Electromusic signal processing family. We are evaluating demand and are very interested in new designs that our chips might foster.”
Check it out and let us know what you think about the prospect of new CES chips!