1. Select the sound source input to I2S;
2. Press and hold the NOS button for 3 seconds until the I2S light flashes;
3. Press the NOS button during the flashing process to cycle through the phase modes (there are total 8 modes, 1X, 2X, 4X indicator lights are binary mode Display);
4. Stop the operation when you selected the satisfied sound, the machine automatically exits the mode setting function.