Abstract: An example peripheral apparatus is configured to communicate with a game controller configured to control a game apparatus. The peripheral apparatus includes a sensor configured to detect a user input, a processor and a transmitter. The peripheral apparatus is configured to operate in one of a plurality of modes including a first mode and a second mode while a communication connection between the peripheral apparatus and the game controller is established. In the first mode, the processor generates a command configured to cause the game controller to execute an operation based on peripheral apparatus data in accordance with a user input detected by the sensor, and the transmitter transmits the command to the game controller. In the second mode, the transmitter transmits the peripheral apparatus data to the game controller.

Abstract: An example of an information processing system includes a vibrator. The information processing system is configured to store a frequency model function representing a model of vibration frequency transition, wherein the frequency model function includes, as variables thereof, a frequency variable representing a frequency for a period in the model and a period variable for that period. The information processing system is configured to determine a value of the frequency variable and a value of the period variable. The information processing system is configured to generate vibration information representing a vibration pattern that is defined by a frequency transition obtained by applying the value of the frequency variable and the value of the period variable to the frequency model function. The information processing system is configured to control vibration of the vibrator based on the vibration information.

Abstract: An example of an information processing system includes a vibrator. The information processing system is configured to store a frequency model function representing a model of vibration frequency transition, wherein the frequency model function includes, as variables thereof, a frequency variable representing a frequency for a period in the model and a period variable for that period. The information processing system is configured to determine a value of the frequency variable and a value of the period variable. The information processing system is configured to generate vibration information representing a vibration pattern that is defined by a frequency transition obtained by applying the value of the frequency variable and the value of the period variable to the frequency model function. The information processing system is configured to control vibration of the vibrator based on the vibration information.

Abstract: An example peripheral apparatus is configured to communicate with a game controller configured to control a game apparatus. The peripheral apparatus includes a sensor configured to detect a user input, a processor and a transmitter. The peripheral apparatus is configured to operate in one of a plurality of modes including a first mode and a second mode while a communication connection between the peripheral apparatus and the game controller is established. In the first mode, the processor generates a command configured to cause the game controller to execute an operation based on peripheral apparatus data in accordance with a user input detected by the sensor, and the transmitter transmits the command to the game controller. In the second mode, the transmitter transmits the peripheral apparatus data to the game controller.