A flexible, 8hp, low-noise four channel audio mixer. Three of the four channels have an output that removes it from the mixer circuit and allows it to become a standalone attenuator. This gives the flexibility of using the module in several ways...

4 Channel Mixer.
4 Independent Attenuators.
2 Attenuators and a 2 Channel Mixer.
1 Attenuator and a 3 Channel Mixer.