A first device includes one or more processors and memory storing one or more programs configured to be executed by the one or more processors. The one or more programs include instructions for receiving, from a second device, audio mix information for a first audio item and receiving, from the second device, an indication that the first audio item is to be mixed with a second audio item distinct from the first audio item. In response to the indication, the one or more programs include instructions for transmitting to the second device an audio stream including the first audio item and the second audio item mixed in accordance with the audio mix information.

An information processing method according to the present invention includes providing first musical piece information representing contents of a musical piece and performance information relating to a past performance prior to one unit period within the musical piece to a learner that has undergone learning relating to a specific tendency that relates to a performance, and generating, for the one unit period, performance information that is based on the specific tendency with the learner.

An acoustic device includes: a first display unit; a second display unit; an operation unit configured to receive a user's operation; a judging unit configured to judge a type of the operation performed on the operation unit; and a display controller configured to, in response to the type of the operation determined by the judging unit, change display contents of the first display unit to display contents corresponding to the type of the operation and display on the second display unit at least a part of the display contents having been displayed on the first display unit.

An acoustic device includes a rotary operator and a base supporting the rotary operator so that the rotary operator is rotatable. The rotary operator includes a rotary body provided on the base, a pressed portion provided on the rotary body and on which a pressing operation is performed, a press detecting unit provided on the rotary body along an outer circumference of the rotary operator and configured to detect the pressing operation performed on the pressed portion, and elastic members interposed between the pressed portion and the press detecting unit.

A system and a method for synchronizing performance effects with a musical performance. The method includes receiving a MIDI signal representing an audio track currently being played; determining, in near real-time, a tempo value of the said audio track based on a corresponding clock speed information as obtained from the MIDI signal; receiving information about a video file selected to be played along with the said audio track; determining, in near real-time, a tempo value of the said video file based on the received information thereabout; processing the said video file to determine required playback speed adjustment therefor to cause the tempo value of the said video to be in sync with the determined tempo value of the said audio track; and playing the said video file with the required playback speed adjustment applied thereto, along with the audio track in the musical performance.

A performance analysis method according to the present invention includes generating information related to a performance tendency of a user, from observed performance information relating to a performance of a musical piece by the user and inferred performance information that occurs when the musical piece is performed based on a specific tendency.

A signal generation device includes a memory configured to store instructions and a processor communicatively connected to the memory. The processor is configured to execute the instructions to function as a signal generation unit to generate a sound signal based on key operation data associated with a key operation and a decay control unit to control a decay speed of the sound signal based on pedal operation data. The decay control unit is configured to control the decay speed to a first speed in a case where the pedal operation position is in a first range, and the decay control unit is configured to control the decay speed to a second speed in a case where the pedal operation position is in a second range. A first boundary position between the first and the second ranges is determined based on control information obtained by the key operation.

An information processing device executes: a process of generating, from inputted data of a musical piece, a plurality of intensity data in a predetermined time interval, each of the plurality of intensity data indicating a timing governing a beat of the musical piece and a power at the timing; a process of calculating a cycle and a phase of the beat of the musical piece by using the plurality of intensity data for each of the time intervals; a process of detecting a generation timing of a beat sound based on the calculated cycle and the calculated phase of the beat of the musical piece; and a process of setting one of a wide range and a narrow range narrower than the wide range as a BPM range to be used for calculation of the cycle and the phase of the beat for each of the time intervals.

A handheld musical instrument for playing a variety of audio program, the handheld musical instrument includes a main body portion with one or more sensors, a handle portion engaged with said main body portion, wherein said handle portion includes one or more control buttons to select a type of program to be played by said handheld musical instrument and a gesture detection module for detecting gestures associated with said handheld musical instrument and controlling a tempo associated with said program played by said handheld musical instrument based on said detected gestures.

A content control device includes: a plurality of controls to which a plurality of parameters for controlling properties of a content containing at least one of sound and video are respectively assigned, each of the plurality of controls outputting a first indicated value in accordance with an operation amount of the control; and a processor configured to previously create setting information used to determine respective values of the plurality of parameters in accordance with the second indicated value; determine the values of the plurality of parameters corresponding to the second indicated value respectively in accordance with the second indicated value and the setting information; and revise each of the values of the parameters to be determined in accordance with the first indicated value outputted for the control assigned to the parameter.