Ultimate version of the legendary King Drone.

Six triangle wave oscillators with a truncated vertex. Three in the black section are tuned very low for deep bass notes, three another in the blue section - approx. 1 octave higher.
Each oscillator has it's own Frequency and Volume knobs.
Low-Pass / High-Pass filter with Cutoff and Resonance.
Three waveform (sine, sawtooth, ramp) LFO modulation. Level and Frequency of modulation are adjustable.
Line input allows to add any external signal and process it through the filter.
CV input affects the Cutoff parameter of the filter

Tech info:

Output: 1/4'' Mono
Power jack: 5.5x2.1mm
Power supply: 9 volts, tip negative (similar to guitar pedals power supply)