Communication Device, Method, Non-Transitory Computer Readable Medium, and System of a Remote Conference

A communication device may acquire material data to share with a particular communication device, when one or more of first image data and first audio data is outputted. The communication device may determine whether the acquired material data includes audio data. Additionally, the communication device may change a first sound volume setting to a second sound volume setting, in response to determining that the acquired material data includes audio data. The communication device may output, through an audio output device, received first audio data according to the second sound volume setting and the material data according to a third sound volume setting.