Sample and Hold
What is Sample & Hold?
Sample & Hold (S&H or S+H) is a function that takes a continuous input signal (often noise or random voltages), and grabs – or “samples” – the current value whenever it receives a trigger or clock pulse. It then “holds” that value until the next pulse.
The result is a stepped, choppy modulation signal that feels random but is locked to a rhythm – kinda like glitchy pixel art for voltage.
Common Inputs
- Noise: The classic input – produces stepped random voltages from endless randomness at high rates that noise generates.
- LFOs: Sampling an LFO creates rhythmic, stair-step versions of smooth movement.
- CV or Audio: You can get weird by sampling anything – even melodies or waveforms.
Uses in a Patch
- Random Pitch: Send S&H to a quantizer or oscillator for stepped melodic randomness.
- Glitchy Modulation: Modulate filters, wavefolders, or VCAs for chaotic but controlled motion.
- Pattern Generation: Clocked randomness makes cool generative patches with groove.
S&H is where things get fun and a little unpredictable. It’s the tool that makes modular feel alive, even if it’s just a noise source and a square wave. Embrace the chaos, one sample at a time.