The øchd Expander exp ands Instruo's øchd LFO with interesting control voltages that would otherwise require a whole arsenal of additional Module . The 16 outputs of the expander are derived from combinations of the 8 analog triangle waveforms to create an extravagant array of variable voltages, triggers and four stepped random voltage sources that can best be described as a kind of "slow noise". The expander simply connects to the back of the main module, tripling the total number of øchd voltages and adding another 16 outputs.