Abstract: An example touch pen attachment is attachable to a game controller including a controller-side slide portion. The touch pen attachment includes a housing, an attachment-side slide portion, a stopper portion, and a touch pen portion. The attachment-side slide portion is configured to slidably engage with the controller-side slide portion in a slide direction, wherein the attachment-side slide portion has a first side and a second side with respect to the slide direction, and the controller-side slide portion is insertable into the attachment-side slide portion from the first side. The stopper portion stops a slide movement, in an insertion direction, of the controller-side slide portion. The touch pen portion is on at least one of an end portion of the housing on the first side in the slide direction and another end portion thereof on the second side in the slide direction.

Abstract: Sound pressure information indicated by a sound signal and belonging to a frequency range above an upper limit that enables at least a user to perceive a vibration is converted into sound pressure information belonging to a frequency range less than or equal to the upper limit or belonging to a low-frequency range, and a vibration signal is generated using the sound pressure information after the conversion. This makes it possible to generate a vibration signal.

Abstract: A portable information processing apparatus includes a display, stereo loudspeakers, a pair of vibrators, and one or more processors. The pair of vibrators is provided on a left side and a right side of a main body of the information processing apparatus with respect to a center of the display. The one or more processors are configured to: generate sound signals to be output to the stereo loudspeakers, and output the sound signals; generate vibration signals for vibrating the pair of vibrators by vibrations, each having a plurality of frequency components, and output the vibration signals; and control an image to be displayed on the display.

Abstract: A first fixing portion of an accessory fixes a first game controller so as to rotate about at least a certain axis, and a second fixing portion of the accessory fixes a second game controller. Then, based on a difference value indicating a difference between a first value indicating an orientation of the first game controller and a second value indicating an orientation of the second game controller, a certain game process is executed.

Abstract: An information processing apparatus sets an amount of adjustment for adjusting an output in accordance with a user operation and generates a sound signal so that a sound volume of sound to be output from a sound output apparatus changes in accordance with the set amount of adjustment. Then, the information processing apparatus generates a vibration signal so that a magnitude of vibration to be imparted by a vibration apparatus changes in accordance with the set amount of adjustment.