Pan hard left, set delay to ~15ms, and detune by -5 to -10 cents.

When working with a "Doubler 2 stereo" setup—likely referring to the popular plugin—the goal is to transform a thin, mono signal into a wide, cinematic stereo field.

In practice, this device would find homes in several critical applications. For lead vocals, a subtle "Doubler 2 Stereo" can add radio-ready width without resorting to reverb wash. For rhythm guitars, it replaces the need for dual takes—freeing up tracking time. In electronic music, it transforms a rigid mono synth pad into a swirling, immersive texture. However, the engineer must exercise restraint. Overuse leads to phase cancellation when summed to mono, or a disorienting "hole in the middle" where the center image collapses. The best settings often involve a dry signal blended back in, anchoring the source while the doubled copies provide wings.