The compact Nektar Technology MIDIFLEX4 is a highly flexible 4-port USB MIDI interface with flexible I/O port routing and merge and split features, making it well suited for the studio or for live performance.

Housed in a roadworthy aluminum housing, the MIDIFLEX4 can easily adapt to any situation. Use as a 1-in / 3-out, 2-in / 2-out, or 4-out MIDI interface on Windows, MacOS, and iOS devices. What's more, as a Class Compliant device, it requires no drivers, making setup fast and easy.

MIDIFLEX4 automatically detects if there is a MIDI in or out connection and displays the status with its MIDI port indicators. Expand the number of ports by adding multiple MIDIFLEX units, which can be used simultaneously.

The device also functions without a computer, allowing it act as a standalone MIDI 2-1 merge or 1-3 split box. A dedicated button on the unit ensures easy switching of the modes with instant visual feedback on the 4 MIDI LED indicators. The MIDIFLEX4 includes a USB cable and a Bitwig 8-Track software license card.

Smart MIDI Interface    Automatically Detects MIDI Connection    Use 1-In / 3-Out, 2-In / 2-Out, or 4 Out    Class Compliant, MacOS, Windows, iOS    Standalone MIDI 2-1 Merge or 1-3 Split    Built-In Indicators for Ports and Power    USB Bus Powered with Cable Included    Rugged Aluminum Enclosure    Expandable via Additional MIDIFLEX4s    Includes Bitwig 8-Track Software Card

• USB Class Compliant MIDI Interface
• 4 configurable MIDI Ports: 1-in / 3-out, 2-in / 2-out, or 4 out
• Automatic MIDI connection detection
• Multiple units can be used at the same time to expand the number of MIDI ports
• 2-1 MIDI merge or 1-3 MIDI split in standalone mode (requires optional USB power supply)
• Aluminum housing with 4 port status LEDs, 1 power LED, and a mode button
• Connections: 4 x MIDI DIN socket, 1 x USB Type-B 
• Powered by USB or optional external standard USB power supply 
• Includes standard USB cable and Bitwig 8-Track software license card

Related Questions and Answers

Q: 1. Can I use this as a triple midi usb to din converter? I mean, using three usb midi controllers at same time sending to different midi din outs

A: Unfortunately not.

Q: 2. How would this work a AKG C414 XLII?

A: With 48V enabled, the MOTU M4 Desktop 4x4 USB Type-C Audio/MIDI Interface will accept a connection into its main XLR combo jack inputs from the AKG C414 XLII Large-Diaphragm Multipattern Condenser Microphone via standard 3-Pin XLR cable.

Q: 3. Can this be used to connect a computer(running ProPresenter) to a lighting controller(separate hardware)?

A: Yes, the ESI M4U eX 8-Port USB 3.1 Gen 1 MIDI Interface with USB Hub could be used to connect a lighting controller operating over standard 5-Pin MIDI protocol to a computer running a specific, correlating software.

Q: 4. THIS PRODUCT IS NEW?

A: All items in our inventory are new unless clearly stated otherwise on the item's page, or if you are searching on the Used section of our website.

Q: 5. Can it send USB MIDI to an iOS device over its host ports?

A: If you iOs devices uses USB 3.1, then yes. But if you have a newer machine with lightning or thunderbolt, then no.

Q: 6. This is similar to a previous question about Outputs 3&4. You answered that 3&4 will mirror 1&2 and you can use them for a separate set of monitors, which is what I plan to do. My question is can you switch between the two sets, like an A/B switch or something? Since there isn't a hard switch, is there a control panel which will do this? I'm in the Mac universe.

A: After doing some research, I see that other M4 users have asked MOTU about the same thing (switching between two sets of monitors) but it seems that the M4 does not offer that feature at this time. The only option for now is to route the two outputs to a separate mixer or A/B switch. You may want to contact MOTU directly to let them know that having the ability to switch between two sets of monitors is a desirable feature that users would like to have on the M4. You can reach MOTU by phone at 617-576-2760. Their offices are based in Cambridge, Massachusetts.

Q: 7. I need system to run on Win7 32bit. I need it to be compatible and not like MOTU that just say it Win7 is no longer supported.

A: According to the manufacturer, the ESI M4U eX 8-Port USB 3.1 Gen 1 MIDI Interface with USB Hub is compatible with Windows 7, 8.1, 10, and 11, as well as macOS. It is capable of recording on Windows 7 32-bit.

Q: 8. Will this work with ProTools?

A: Yes, you can set up the Impact LX25+ controller for use with Pro Tools.

Q: 9. Can I use this MIDI hub in a live show? And would each MIDI controller work individually in Ableton Live (using different VSTs on each MIDI controller of course)?

A: Yes, the ESI M4U eX could be used for a live performance. Each MIDI input will be recognized as a separate channel by your DAW.

Q: 10. Can you connect it directly to the new IPad Air 4th gen, via USB-C, or do you need an adaptor/CCK?

A: Yes, the MOTU M4 can be connected directly to iOS devices with USB-C running iOS 9 or later using a standard USB-C to USB-C cable.