A method can include the steps of logging in of mobile devices of participants when they are located in the same physical conference environment and managing the resources of these devices such that the resources of the logged-in devices are combined into an audio system to output audio conference information using a sound output process in the conference environment. The conference environment may be a conference room. The audio conference information may be audio to be output to the participants at the conference environment. The formed audio system can include speakers of the user devices for outputting such audio. The microphones of the user devices may also be used to form an audio input system for the conference for allowing audio of the participants to be received and transmitted during the conference. A communication system can be configured to implement embodiments of the method.