Angle Grinder quadrature sine wave oscillator, filter, distortion effect

Schlappi Engineering

Regular price ~~$2,440.00 HKD~~ $2,318.00 HKD Sale

Angle Grinder is a quadrature sine wave oscillator or filter and distortion effect.

The function of the Angle Grinder depends on both the position of the knobs and the presence of an input signal.

Features:

Quadrature Sine wave VCO with four phase related outputs: 0°, 90°, 180°, 270°
HIGH range from 10Hz to over 20kHz
LOW range from 0.3Hz to over 500Hz
Tracks 4+ octaves of volts per octave at the V/OCT input
FM1 is linearFM
FM2 is additional exponential V/OCT jack
With no input GRIND section provides voltage controlled harmonic content
With input GRIND section compares each phase against GRIND IN signal
Each slider subtracts the compared signal from the input signal, creating complex waveshapes
When GRIND is fed into the SPIN section the outputs become a state variable filter
DAMPING counteracts the oscillation and allows an external signal through
When filtering the four phase related outputs are: LOW PASS, BAND PASS, HIGH PASS, and INVERTED BAND PASS
When filtering the GRIND section is a nonlinear feedback network for harsh and unpredictable timbres
The four phase feedback paths can be separately voltage controlled
The INJECT jack can be used as a second input for either audio or CV, bypassing GRIND
All analog OTA based design
18 HP
Power requirements :+12V 81mA, -12V 78mA