This is a DIY kit that was sold by Thonk. Although it is now SMD and only available as a finished product, this one is through-hole and has a thick sound. There is also a Tiptop Buchla 258 clone now, but Danny Sound's Cali was more satisfying in terms of sound quality and functionality. I have checked the operation before listing. The Cali Oscillator is a new and improved version of the classic Buchla 258 wave shaping oscillator with an additional pulse width modulation output. This oscillator features classic Sine to Square and Sine to Saw wave shaping with dedicated CV control. The Cali Oscillator differs from previous versions of the 258 in that it has a 3-way position switch instead of a 2-way switch. This new center position features a bonus waveform that forms from a pulse to a kind of triangular trapezoid. The shaping control is more unpredictable in this intermediate position, and the switch reacts to physical contact when the wave shape is set low - it can be thought of as an extra bonus waveform and is perfect for generating glitchy sounds! It has dedicated inputs for linear and exponential FM, and the Cali adds a pulse output with its own width control and PWM CV input. The behavior of the pulse output can be affected by the waveform switch and the position of the waveform control. This module features coarse and fine frequency control and an LFO mode. The LFO range is accessed via an LED push button that also functions as an LFO speed indicator. The button lights up when the waveform passes through a positive cycle. Since waveform modulation is independent of pitch, this oscillator is very useful for creating complex timbres while maintaining musical pitch. Type: Eurorack Type: Modular Synth