ESI M4U eX

This is an interesting device which provides more functionality than most midi interfaces. But there are a few flaws which stop it from achieving what it is trying to be.

PRO:

– Very well built.
– Great price, although I would have preferred it to be a little bit more expensive if it meant it could have included what I note below.
– The function that each port can be an input or an output makes it really flexible in most setups. This should be implemented in all midi interfaces.

CON:

– The USB ports at the back can only be used when the device is plugged into a computer – and then only as a standard USB hub. There is no option to route MIDI between the DIN ports and the USB ports internally. This is a missed opportunity.
– The three options in standalone mode are fine if they cover what you need, but it would be better if there was an internal MIDI routing and filtering system. Then the user could decide themselves how the device is used. Again, missed opportunity.
– The lack of a power button is annoying. You need to unplug the device for the LEDs to switch off.

So overall, some good ideas, but it feels this device could have been a lot more. After trying to fit it in my setup for a few weeks, I have decided to sell mine and buy an iConnectivity mioXM instead.