Slate Digital Rotary SD-147

$99.00

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The rotating speaker cabinet behind half a century of records you've heard. Modeled in full. Plus a few things the original couldn't do.

The Cabinet Masterfully Modeled

It worked. Then it kept working on instruments it was never designed for. By the time pop music caught up, the rotating speaker had been used on jazz organ, gospel piano, psychedelic guitar, soul horns, prog rock vocals, and a Beatle pretending to be the Dalai Lama. Rotary SD-147 puts that cabinet on a track in your DAW. Mono or stereo. Mac or Windows. No 150-pound box. No cracked capacitors. No relay clicks.

Two rotors, modeled top to bottom

A rotating horn for the mids and highs. A rotating drum for the lows. Independent gain on each so you can find the balance you want: bright and singing, warm and round, or something the original cabinet was never quite capable of. Acceleration and deceleration are modeled per rotor, matching the real cabinet. The lighter horn ramps up before the heavier drum catches up.

Three speeds. Played, not just set.

Slow (Chorale). Stop. Fast (Tremolo). The toggle is the heart of the instrument, and it was always meant to be played live. Map it to a MIDI controller or a keyswitch and you'll trigger the spin-up and spin-down in real time, the way the cabinet was used on stage. Or automate it in your DAW so the transitions land on the beat. The Accel and Decel knobs decide how fast the rotors get there: clockwise for snap, backed off for long woozy ramps. Tempo Sync locks the rotation to your project tempo for musical time. (And if you want to decide where the rotors stop, Brake to Position handles that. More on it in the next block.)

Beyond physics

Mechanical noise from "real and noisy" to "completely silent."
Mic bleed on (the natural recording behavior) or off (impossible on the original device, since each rotor was always picking up sound from the other).
Brake to Position stops the horn and drum at any angle you specify, fully automatable. Pin the sound to an exact spot in the stereo field on a precise beat. The original cabinet could do none of this. We built it because you should be able to.

Use Cases

Organ

Still the home base. Drop it on an organ track, hit the speed switch, and the part finds itself.

Guitars

Sustained chords, lead lines, arpeggios. The cabinet is part of the rock canon for a reason. Harrison and Clapton ran their guitars through it. So did Hendrix, Gilmour, and Buddy Guy. Next time you want a clean lead to feel less like a clean lead, this is what you reach for.

Synths and pads

A synth pad through a rotating speaker stops sounding synthetic. The Doppler-and-tremolo combination is the closest thing in audio to actual air motion.

Vocals

Backgrounds, lead doubles, dream sequences. If you want a vocal to sit in space rather than in front of the speakers, this is one of the oldest ways to put it there.

Lo-fi production

The pitch instability of a real rotating speaker is most of what lo-fi producers chase with broken tape emulations. Crank the noise level, dial back the depth, throw it on a Wurli or a sampled chord, and listen to the bottom drop out of the room. The mechanical noise alone can stand in for vinyl crackle.