RK-006 Portable USB MIDI/Gate Hub


The first hub/host which uses the TRS-A MIDI format and brings unparalleled portability and functions! And we took it even further: The outputs can change their function to MIDI/Gate or PWM, offerering formidable connecting possibilities for any MIDI device and beyond!

– A 12-port individual bus USB MIDI interface
– Full MIDI Support, Ultra fast MIDI handling
– 10x Out, 2x MIDI IN (with auto-merge in standalone mode)
– Standalone USB Host for Multiple USBMIDI Devices
– Configurable outputs: TRS-MIDI-A / Gate / PWM
– Per-port MIDI Filtering
– Per-port Clock shifting and Clock Processing
– Built-in polychaining of MIDI devices
– Master Clock Generator
– Plays Standard MIDI files (type 0 and 1) from a USB Stick

All at the size of an Altoids tin?? Some call it a ‘gamechanger’!… we call it the RK-006!


So let’s elaborate on the RK-006 specifics and it’s special features which differentiate it from the rest:

You can use the RK-006 completely standalone with the same ease of using a 2-in, 10-out thru hub (with usb-standalone hosting and port filtering benefits), or you can use it as a 2-in, 10-out  USB MIDI interface on your favourite platform/DAW (PC / MAC / Linux / Android / iOS (on iOS you need the apple usb connection cable) Just use one of the ten presets or configure and store your own custom configurations in the RK-006 via our webMIDI-settings-interface.

Every output port on the RK-006 can be individually set to send out full MIDI or Gate pulses, making a lovely hybrid use of it’s 3.5mm TRS connectors: You can connect DIN5 MIDI Gear via the included TRS-A to DIN5 cables or just plug in a plain ‘stereo minijack audio cable’ (preferably shielded) to sync up modular gear or even ‘minijack-MIDI’ devices like the Korg Electribe or NTS-1 and such.

In MIDI mode you can apply MIDI Channel/Clock filtering and even clock modifiers (‘Multiclock’, allowing creative use of an abundance of sequencer gear which are available nowadays. Cou can even chain multiple MIDI devices together. Of course the RK-006 can also power our advanced RK-002 Smart MIDI processing cable as well so you can use it as a MIDI FX chain.


When you set a port to Gate mode the MIDI-Tempo-to-Gate multiclock is still available. This together with an assignable Run/Stop signal allows synchronisation of devices like older Sync24/DINSync units as the TR-808, TR-303 and TR-606 (just to name a few) but also newer ones like the Moog DFAM and Teenage Pocket Operators and anything inbetween; Directly from your MIDI device.

Gate signals can be triggered via a MIDI clock signal but also via MIDI Notes, adding the ability to bridge MIDI controller pads and modular gear.


The one-button on the RK-006 can be used to tap in a master clock or change presets on the RK-006 routing. You can also use it to switch from seemingly a MIDI merger/thru box to e.g. an independent dual-brain setup or one-big-master-gate-clocks-generator.


By using a simple (and included) OTG Adapter cable you can even connect plain 5V power and a USB hub to the RK-006 and host multiple USB-MIDI devices. The RK-006 will interconnect them and merge them together with the existing hardware ports. And because one USB-cable can route a whole lot more than just a MIDI-In or MIDI-Out we added extra filtering to specifically target these USB devices as well.

And while in the USB area: You can even plug in a USB Memory Stick with prepared MIDI files (also called ‘SMF’). You can export these files on a DAW like Bitwig, Fruityloops, Ableton or Reason and playback these prepared tracks on your DAWless system, ready to play or clock-slave on your standalone sequencer of choice and play along live with it.

This might already be too much info, but the story does not finish there quite yet:


All the above can take place in the DAWless area BUT….You can also connect the RK-006 to e.g. a Desktop computer or iPad (note that iOS do need Apple’s USB2Lightning cable) and enjoy all the RK-006 ports independently addressable on your DAW! This means:

* 10 separate MIDI outputs, every one of them can accommodate 16 MIDI devices
* 2 separate MIDI Inputs

Also, for usability’s sake we added:
* Aggregate merged MIDI Out port to ALL 10 ports
* Aggregate auto MIDI Merged Input

You can find the accompanying manual here elaborating on the features. If you’re in an advanced mode – check out the RK-006 settings page (useable with webMIDI on chrome / edge browser) or download the iOS app. The MIDI SysEx implementation is available too, it’s hjuuudjz!.

Includes the following accessories:
1x RK006 Master Hub
1x Micro USB Cable
1x USB Client to USB-Host dongle (‘OTG cable’)
1x TRS-A to Female DIN5 Dongle

The Cable Bundle includes the following extras:

1x TRS-AxB Dongle
4x 1.5m Shielded TRS-A to male DIN5 cables

SKU: RK006 Categories: , Tags: , , , , , , , Barcode: 7434051990912.

Additional information

Weight 0.25 g
Dimensions 7 × 5 × 1 cm

RK006, RK006 Cable Bundle


Brown, Blue, Orange


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