Abstract: To enable channel setting to be performed easily and accurately to speakers. Thus, provided is a speaker system including: N number of speakers, the N being three or more; and a signal processing device capable of communicating with each speaker. The signal processing device performs processing of recognizing two arrangement reference speakers with reception of notification that a designation operation has been received from a user, from two speakers among the N number of speakers, and processing of acquiring distance information between each speaker. The signal processing device recognizes a relative-position relationship between the N number of speakers, with the two arrangement reference speakers and the distance information between each speaker. Then, the signal processing device automatically sets a channel to each speaker, on the basis of the relative-position relationship recognized.

Abstract: An information processing apparatus with a plurality of USB (universal serial bus) ports to which USB devices can be connected, includes: detection means for detecting the USB port of the plurality of USB ports to which the USB device that is in the course of data communication is connected; and first display control means for displaying on a display unit provided in a position corresponding to the detected USB port the fact that the USB device connected to the detected USB port is in the course of data communication.

Abstract: An information processing apparatus with a plurality of USB (universal serial bus) ports to which USB devices can be connected, includes: detection means for detecting the USB port of the plurality of USB ports to which the USB device that is in the course of data communication is connected; and first display control means for displaying on a display unit provided in a position corresponding to the detected USB port the fact that the USB device connected to the detected USB port is in the course of data communication.