Unsurprisingly it’s a sample pack made with the famous OSC OSCar. It’s a unique and increasingly rare synth. The oscillator section is particularly interesting as it strays heavily into additive synthesis. Because it’s an early 80s digital oscillator it aliases like mad, but frankly who cares: it sounds great.
Couple the crazy digital oscillator with a cool analog filter which was one of the first to feature built-in overdrive (inspired by the Minimoog trick of feeding the synth output back into the filter input) and you get a synth with a signature sound that is crunchy, overdriven and aliased. And it’s all the better for it. A great synth with great character, and now available as a Kontakt sample pack.
Head over to the OSCar webpage for more info.