Humanization randomizes timing and velocity, distinct from swing's systematic long-short pattern
Swing applies a systematic, repeating long-short delay (the second beat of each pair delayed). Humanization instead applies small, non-repeating variations to note timing and velocity, simulating the natural imprecision of live playing. The two are complementary but distinct: swing creates a recognizable rhythmic feel; humanization creates a sense of aliveness without a specific pattern. A Tightness control governs how strongly a captured performance is pulled back to the grid, i.e. how much humanization survives. For maximum realism producers often use both.
Examples
A drum loop with 50% swing feels like a shuffle; the same loop with humanization applied (Swing at 0%) feels loosely human but without shuffle character. Combined, it feels like a real drummer playing a shuffle.
Assessment
Describe the difference between a beat with only swing applied and one with only humanization applied. What does each contribute to the groove? When would you use both?