I wanted to mention how pleased I am with this product. It works exactly as advertised and I experience no latency with my keyboard or DTXpress drumset when run them through the Quadra Merge. I recommend it.

Does exactly what it's meant to do...and does it well! I use it very frequently and it works like a charm. I've had it for about a year and a half now. If you need a simple device to merge your midi messages, this is for you!

MIDI Solutions makes great stuff and this is no exception. It does just what it says. Take any four MIDI sources (say, a couple keyboards, a wind controller, and some foot pedals)...and it merges them into one output. A graceful solution to a deceptively simple problem.

This unit is powered by MIDI connection to the device on Input #1...so make sure you connect something to that port and turn it on, or the unit won't work and you'll be left scratching your head.

Solid, reliable, and indispensable.

I purchased one of these units from this site and I'm going to return it cause it has problems with clock messages. If your not using it for the time clock then it should work ok. If you need to merge with clock messages use M-Audio. I've used the Midi Merge 2X2 and it has never messed up a clock message.