Sample-and-hold and smooth random voltage sources animate patch parameters generatively so a static patch keeps evolving

To stop a looping patch from feeling static, patch random control voltage into timbre or effect parameters. A sample-and-hold takes stepped random values (set to a bipolar range like ±5 V) at a chosen clock, producing discrete jumps; a ‘smooth random’ source (a random walk) produces continuously drifting voltage instead of steps. Attenuate each so the modulation depth is musical, and roll off unwanted low-frequency content in the affected voice. Applied to grain size, decay, or reverb size, these sources give slow, hands-free variation — the core of generative modular movement.

Examples

VCV Rack: trigger a Bog Audio sample-and-hold from the sequencer’s rest output, ±5 V, attenuated into a granular voice’s size and decay; add Walk (Bog Audio) smooth random voltage to modulate the same voice for continuous drift.

Assessment

Contrast a stepped sample-and-hold and a smooth random-walk source as modulation for the same parameter: describe how each sounds over time, and why you attenuate their outputs before patching them in.