MultiVoltage Merger 2-in 2-out MIDI Merge Box

Big change to my review here, I previously thought it was damaging my devices. I emailed their support and they were quite patient with me and explained what was actually going on. What happens is some MIDI devices provide marginally low voltage so they can only intermittently power the device. I had trouble with the Alesis Control Pad and the Roland HD-3. After their explanation, I found with both my devices can power it if I am a bit patient. I have to play a while and it will eventually come on, and once it is on it stays on just fine and works perfectly. It's only after I power down, it takes a bit of patience to get it to power back on. I know many people (on a drum forum I hang out on) who have used this device with many other MIDI devices without any trouble at all. They also sell a device that will power it correctly if your device can't. I may need to get one now that I know what is going on.

Extremely useful and works great. NOTE: the image and description are incorrect - this device has TWO outputs (essentially a 2-1 merger and 1-2 thru in the same device). I have two keyboards and two synth modules connected to this device; by changing which midi channels the keyboards are set to I can have two keyboards controlling a single module (like a two manual organ) or each keyboard controlling its own module. This is exactly what I was looking for.

Does exactly what I needed it for. It combined two midi signals from my Korg Kronos and Yamaha moxf6 to control a tc electronics voice harmonizer.

I bought it to merge two midi in’s to one out, so that i can manage these with the Squarp Pyramid MK2; works like a charm.

I bought this item in order to connect two midi controllers (Axiom and Ozone from M-Audio) to my groovebox (Roland MC-808) that has only one MIDI INPUT. The idea was to have each controller set in one specific (and different) channel to control different sounds in MC-808 (I can set one sound per MIDI channel in MC-808). I was worried if the midi merger would convert all signals from both controllers in just one MIDI channel. Fortunately not! I set Ozone to MIDI channel #13 and Axiom to MIDI channel #15 and the signals reached the MC-808 in separated channels. I have not realized any note conflict. Perfect!

I have not used the 2-input Merger for very long. However, I hooked it up to connect two keyboards into one voice harmony module and both keyboards now control the module. Also, both keyboards can be used at the same time and the MIDI Merger still transmits the proper information from both units to the voice module. Exactly what I hoped to accomplish. There has also been no issues with the unit powering from the Korg Tritons that I am using. Consider me a happy camper.

Used to combine the midi signal from two Roland TD-11 drum modules into one midi signal to send to my Xbox for Rock Band.

As advertised. Is fine. Using in church/worship setting with organ: allows me to input to the organ from both the organ's built-in midi module and from a computer running a midi player without having to unplug either. Plug it in, leave it alone, forget it's there. Would recommend.