Slate Digital Rotary SD-147

Slate Digital Rotary SD-147Rotary SD 147 is an accurate model of the rotating speaker cabinet behind a half century of records. Every classic organ track. Tomorrow Never Knows. Little Wing. Black Hole Sun. A long list of others. The two rotors, the cabinet reflections, the tube amplifier, the crossover, the saturation, the mechanical noise, the acceleration physics. All of it modeled. Then it adds things the original cabinet couldnt do. Silence the motor noise. Eliminate mic

Rotary SD-147 is an accurate model of the rotating speaker cabinet behind a half-century of records. Every classic organ track. “Tomorrow Never Knows.” “Little Wing.” “Black Hole Sun.” A long list of others. The two rotors, the cabinet reflections, the tube amplifier, the crossover, the saturation, the mechanical noise, the acceleration physics. All of it modeled.

Then it adds things the original cabinet couldn’t do. Silence the motor noise. Eliminate mic crosstalk. Stop the rotors at an exact angle. Resize the cabinet. Lock the rotation to the project tempo. Automate every parameter. Map the speed switch to a MIDI controller and play it live the way the cabinet was used on stage.

Mic placement, not just mic choice
Rotary SD-147 includes ten mic models from the ML-1A Virtual Microphone System (built in, no separate VMS purchase required) for both the horn and the baffle. The stereo horn pair has independent distance, offset, and angular-width controls. The mono baffle mic has independent distance and position-around-the-cabinet controls.

Three classic horn-mic setups (90°, 180°, mono) and two baffle setups serve as starting points, but any mic can be moved anywhere around the cabinet. With Mic Bleed switched off, each mic captures only its rotor, a separation impossible with the real device. The result is the same flexibility an engineer would have with the actual cabinet in a treated room, without either.

Built for organs. Works on everything.
The rotating speaker started as an organ accessory and stayed there for fifteen years. Then guitarists noticed (Harrison, Clapton, Hendrix, Gilmour). Then vocalists. Then lo-fi producers chasing pitch instability. The plugin handles all of it: hit the speed switch on an organ pad, automate it under a guitar lead, tempo-sync the rotation under a synth, or crank the mechanical noise to add vinyl-style imperfection to a Wurli.

Pair it with Virtual Tape Machines for analog character on the way in, and Infinity EQ 2 for tonal shaping after. Or drop it into your existing chain. Rotary SD-147 delivers the cabinet sound that anchors decades of pop music on whatever you put through it.

Features

• Two rotor models: horn (mids/highs) and drum (lows), with independent gain on each and realistic per-rotor acceleration and deceleration physics.
• Three speeds: Slow (Chorale), Stop, Fast (Tremolo). Per-rotor Speed Slow and Speed Fast knobs set the rotation rates; Accel/Decel knobs control how quickly the rotors transition between speeds. The speed switch is fully automatable and can be mapped to a MIDI controller or keyswitch for live performance.
• Tube amplifier model: two-channel amplifier with adjustable saturation and user-set crossover frequency between horn and drum.
• Adjustable mechanical noise: scale from real-and-noisy to completely silent, independent of the audio signal.
• ML-1A Virtual Microphone System built in: 10 mic models for the horn and baffle, with the VMS Intensity control, no separate VMS purchase required.
• Free mic placement: three preset horn-mic setups (90°, 180°, mono) with manual distance, offset, and angular-width; two baffle-mic setups with manual distance and position around the cabinet.
• Beyond-physics controls: Mic Bleed on/off, Brake to Position (stop the rotors at any angle), adjustable cabinet size (smaller or larger than the original), adjustable depth.
• Tempo Sync: lock the rotation to the project tempo, with rates shown as multipliers and divisors.
• Full automation: every parameter is DAW-automatable, including the speed switch for in-song movement.