Expanse 3D: Stereo Width and Depth Plugin by United Plugins Free Download

Expanse 3D divides its work into three processors. The width processor uses spectral phase processing to widen the stereo image while keeping bass tight. According to United Plugins, it reduces stereo content from the sub and widens progressively toward the high end, and it remains fully mono-compatible.

The depth processor uses delay networks combined with channel and phase processing to add a shared space. It can add dynamic contrast between separate sounds or help elements sit together in a full mix.

The height processor generates additional harmonics rather than boosting existing frequencies, which the developer says improves the perception of low frequencies on small speakers and adds brightness at the top end.

Each processor uses saturation modeled on analog distortion, and the developer names harmonic distribution, dynamic consistency and anti-aliasing among the details it covers. The processing runs at up to 8x oversampling, and the high-quality filters are described as zero phase shift with no latency, which the developer presents as suitable for mastering.

United Plugins suggests using the plugin subtly on a master. Auto gain is included so you can compare settings without changing overall loudness. A Smart Bypass and a sleep mode that reduces CPU use when no processing is needed are also part of the design.