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Retroaktiv MPG-50 main image

Retroaktiv MPG-50

Retroaktiv MPG-50

^# 82

in Tabletop Synthesizers

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Page last updated Aug 10, 2025

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Description

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Retroaktiv MPG-50 is a fully featured MIDI programmer for the popular Roland Alpha Juno 1 and 2, and the MKS-50 rackmount synthesizer. The MPG-50 is a compact 370mm (14.5") x 149mm (6") x 40mm (1.5"). It features 37 sliders and knobs which control all of the features included on the original PG-300 plus more. The unit is housed in a high-quality rugged powder-coated metal enclosure. Optional powder-coated rack ears are available

MPG-50 is more than just a controller. Here's what else it can do:

Translates CC to Juno sysex, and transmits CC and SYSEX in any combination.
Controls 2 Alpha Juno/MKS-50 from one unit
Intelligent patch generator creates pads, drums, basses, synths, strings, brass, and more with the touch of a button.
Operating system is always being updated with new features. OS updates are done using a simple MIDI file!
Access to all patch menu parameters (MKS50) and ability to select programs.
Create user CC maps to use MPG-50 as a generic controller.
Assignable matrix allows users to control multiple parameters with one slider for expressive effects. Also allows expression pedal, mod wheel, aftertouch, and breath control of any Alpha Juno parameters.
Scratch patch generator and "manual mode"
Crossfade between 2 Alpha/Junos
MIDI data filtering
High quality metal case. Sliders have dust covers. Durable rubber feet.
Chord Mode
Midi data filter. Individual toggles to filter note, mod wheel, prog change, pitch bend, aftertouch.

Videos

Espen Kraft

MPG-50 | Review | You want a controller for your Alpha Juno?

Video thumbnail for MPG-50 | Review | You want a controller for your Alpha Juno? by Espen Kraft

MPG-50 | Review | You want a controller for your Alpha Juno?

Espen Kraft

Video thumbnail for New UPDATED MPG-50 for the Alpha Juno / MKS-50 | Controller Power by Espen Kraft

New UPDATED MPG-50 for the Alpha Juno / MKS-50 | Controller Power

Espen Kraft

Video thumbnail for Using the MPG-50's Assignable Controllers by Retroaktiv Synthesizers

Using the MPG-50's Assignable Controllers

Retroaktiv Synthesizers

Retroaktiv Synthesizers

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