Convenient Function EAH-AZ40M2 1 In the home screen of the [Technics Audio Connect] app, tap [AMBIENT] . 2 Select an external sound control mode. R [Ambient Sound] has Transparent and Attention modes. R You cannot adjust the level of external sound control. Set sound enhancement 1 In the home screen of the [Technics Audio Connect] app, tap [SOUND] . 2 Select a sound enhancement. R You can select an option such as Bass Enhancer or Clear Voice. R In Custom, you can set the sound ranges. Move up or down to adjust the level. 50