The "Summing Amp" blends two inputs into a single output, a technique The Edge (U2) adopted for his own delay sounds in the '80s. By placing a quarter-note delay and a dotted-eighth delay in parallel before summing, the effect's two delays are clearer and don't sound like "delay over delay." This can also be used with overdrive, placed in parallel rather than boosting the pedal connected after it as in a series configuration. Another advantage is that by placing a fuzz and a compressor in parallel, the signal going into the fuzz is not affected by the compressor. The Summing Amp allows you to combine effects in new patterns you'd never have considered before, creating fresh and exciting sounds with old pedals. It's a simple device that simply converts two inputs into a single output, but its potential is endless! The Edge (U2) adopted this technique for his own delay sound in the '80s.
It blends two inputs into one output.
It's placed in parallel, rather than boosting the pedal connected after it like in a series arrangement.
By placing the fuzz and compressor in parallel, the signal input to the fuzz is not affected by the compressor.
It can create fresh and exciting sounds.