If you are using a guitar adapter to connect your guitar to the device you are running Yousician on, there are a few things you must have in mind to make sure it works properly. If your guitar adapter is connected in a wrong way, it will not be detected as an audio device and its input channel will not be used.
As an example, headphones must always be connected when using a guitar adapter. To make sure it works properly, you need to connect your headphones to the adapter before you connect the adapter to your device.
Here is how you should to it:
1. Plug in your headphones and guitar to the adapter:
2. Connect your guitar adapter to the device you want to use it on.