if you are using an in-line DAC/converter such as the hiFace DAC, then use a type-A USB extension cable for the signal cable. The power supply should be connected close to the female connector. Tools ...

cable/adapter (USB male Micro-B to female USB A), and a standard charging cable (USB male Micro-B to male A). The OTG cable should be connected to the locked Android phone. The regular USB cable ...