THETA Audio Research

PENROSE

A three-knob mastering processor. Signal falls into the black hole on the left, is stripped to what survives the throat, and emerges from the white hole on the right. The picture is not a skin over a mastering chain. It is a drawing of one.

Lowering HORIZON is the key to pushing the effects into the chain. The ceiling stays armed at −1.0 dBFS; HORIZON sets how far below it the signal starts working the stages, so the further down you bring it, the harder EDGE, BALLAST, HEAT and the EMERGENCE section are driven.

THE BRIDGE

Drag either control. Each knob is a position along the tube, not a brightness. The throat burns harder the closer the two fronts get to it.

THE TWO CONTROLS
Infall

Everything left of the throat. Turn it up and more is taken: resonant peaks flattened, harshness pulled back, low mud cleared, and what remains warmed as it passes through.

No setting of Infall adds anything.

Emergence

Everything right of the throat. Weight underneath, air above, glue across the middle, and a ceiling that stays where you put it.

No setting of Emergence removes anything.

SYSTEM_STATUS // FREE

PENROSE is free. Universal macOS build, AU and VST3. Check out for $0 and the installer arrives by email.

DOWNLOAD ยท MAC

Leave an address and we add you to release notices, then hand you to the secure checkout. Unsubscribe in one click.

UNDERNEATH

A trim on its own does nothing while its macro sits at zero, so the knobs stay the whole operation.

Infall
Temper Edge Ballast Heat
Emergence
Core Halo Gravity
Bus
Horizon Mix Output
TECHNICAL SPECIFICATIONS
  • CeilingArmed at all times at −1.0 dBFS. Horizon is the threshold, measured down from it.
  • InstallationOne signed installer package. Each format is placed where its host expects it.
  • Formats & platformVST3 · AU · AAX · macOS 11.0 Big Sur or later · Apple Silicon.
  • Version0.2.23, in calibration.
THETA AUDIO RESEARCH // 2026 YOUTUBE LAB NOTE #027 // IN ONE SIDE OUT THE OTHER