Dannysound Cali Osc Eurorack Oscillator Module

The Cali oscillator is a new and improved version of the classic Buchla 258 wave shaping oscillator with an additional pulse width modulated output. The oscillator features the 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 rather than 2-way. This new middle position features a bonus waveform that will shape from a pulse into a kind of triangular trapezoid shape. The shaping control is more unpredictable in this middle position and the switch reacts to body contact when the wave shape is set low – it can be thought of as an extra bonus waveform, great for producing glitchy sounds!

There are dedicated inputs for linear and exponential FM and the Cali also adds a Pulse output with its own width control and PWM CV input. The behaviour of the pulse output can be affected by the position of the waveform switch and wave shape control.

The module features Coarse and Fine frequency controls and an LFO mode. LFO range is accessed via an LED pushbutton that also acts as the LFO speed indicator – the button will light up when the waveform moves through its positive cycle.

Because the wave shape modulation is independent of pitch this oscillator is very useful for creating complex timbres whilst retaining musical pitch.

• Sine to saw/square waveform output with CV over wave shaping
• Pulse output with voltage controlled PWM
• Linear FM with attenuator
• Logarithmic FM with attenuator
• Bonus ‘trapezoid’ output
• Coarse & fine controls with LFO mode
• Includes power supply isolation on frequency controls