In a 2.1 system (Stereo + Sub), you cannot just send the full mix to the subwoofer. Using the Foo Channel Mixer matrix:
You route a hot drum loop into the mixer, but the output is whisper quiet. Solution: The Foo Channel Mixer operates on a summing logic. If you route Input 1 to Output 1 and Input 1 to Output 2, you are splitting the voltage/wattage. Increase the gain of the individual matrix cells (from 0.0 to +6.0) to compensate for passive splitting. foo channel mixer
Feed a mono vocal track into both Input L and R. Then, delay one channel slightly (using an external delay) and use Foo to attenuate the delayed copy by 3 dB. The result is a pseudo-stereo effect that retains mono compatibility. In a 2
The Foo Channel Mixer is not a glamorous effect—it will not add warmth, distortion, or reverb. Instead, it is a for audio engineers who need absolute command over channel routing. From fixing flawed recordings to inventing new spatialization techniques, the Foo Channel Mixer belongs in every serious producer’s utility drawer. If you route Input 1 to Output 1
At its core, the Foo Channel Mixer is not a single physical device but rather a conceptual architecture—and in some contexts, a specific software module—designed to manipulate multi-channel audio streams. The "Foo" designation typically refers to a placeholder or a specific open-source project within the audio programming community (often associated with the Foobar2000 ecosystem or custom DSP frameworks).