From Damnation Audio:
At its core The Loop Blender (sometimes called the “Bloop”) is a very simple machine. The Loop Blender started as a custom order for bassist Ron Petzke from instrumental doom band Bongripper. Ron needed a pedal that allowed him to mix in just the right amount of clean low-end into his heavily distorted tone. He wasn’t lacking for lows in his sound. He was lacking in clarity in a dense mix. His requirements were simple and attainable. The loop needed to be full range (no crossovers). The blend control needed to mix in clean lows (like the MBD) and it needed to be small-ish. As a bonus, he also wanted the ability to bypass the whole mess with a single footswitch. This was not a particularly novel idea but it was not commercially available in the simple format he desired. I really liked the idea so I made myself one too and I can honestly tell you that I was blown away with the clarity the Loop Blender brought to my bass rig.