Instru øchd Expander Modulation Source User Guide
- June 16, 2024
- INSTRU
Table of Contents
Instru øchd Expander Modulation Source
Full Wave Rectifiers
All negative portions of the LFOs are inverted resulting in unipolar positive signals at the expander outputs (0-5 volts).
Original LFO Signals Rectified Output Signals
Analogue Diode Logic Pairs
The max/ min outputs produce a bi-polar -5 to +5 volt signal. The top two channels (max) output whichever is currently the highest voltage of the original LFO input pair. The bottom two channels (min) output whichever is currently the lowest voltage of the original LFO input pair
Original LFO Sianals Diode Logic Output Signals
Cascading Triggers
Produces ~8ms triggers at the start of the rising edge of the LFO signals. Clockwise cascading normalization through the outputs results in a layering of trigger signals if the previous output is left unpatched.
Original LFO Signals Trigger Signals
R-2R 4-bit Ladder DACs
There are two factors at play that impact the DAC outputs. Firstly, the rate
of the LFOs sets the rate of the random signals. Secondly, the ordering of
Most Significant Bit (MSB) to Least Significant Bit (LSB) effects the size and
rate of voltage change. The following clusters from the acid will produce four
different flavors of random voltage (slow noise) from the end expander.