The U-AMP is a universal audio amplifier integrated seamlessly with speakers and headphones. It supports digital I2S audio input for Wii, PS2, and Dreamcast, as well as standard analog audio input for any other console. The audio mode is selected by soldering the jumper configuration (J0 and J1). The volume can be increased and decreased by two tact switches (connected to + and -).
Digital I2S input is the best audio quality for a portable. It gives you the ability to bypass the audio digital-to-analog converter present on the motherboards for lossless quality over wires.
Quickly mute the U-AMP by holding down + and -. The headphones and speakers store separate volume levels. When the headphones are connected, it will be at the headphone level and adjusting the volume only affects the headphone parameter. When the volume is at 0, the amplifier is automatically disabled for energy efficiency.
After holding down + or -, the volume will continue to gradually increase or decrease until the button is released
The U-AMP is a one-fits-all seamless audio board for your portable needs!
Refer to the U-AMP documentation for installation https://bitbuilt.net/forums/index.php?threads/u-amp-documentation.3062/