sustain

Fuzz and distortion pedals are often described by how much sustain they add, as with the Big Muff's long sustain¹ and its cello-like sustain for lead sounds². Compressors can also add sustain to dirty tones³ or provide squash and sustain by adjusting knobs⁴. A control labeled sustain may set this amount, and setting gain/sustain very high on high gain circuits can introduce hiss noise⁵.