An electronic musical instrument includes a performance operator and at least one processor. In accordance with pitch data associated with the performance operator operated by a user, the at least one processor digitally synthesizes and outputs inferential musical sound data including inferential performance technique of a player. The inferential performance technique of the player is based on acoustic feature data output by a trained acoustic model obtained by performing machine learning on: a training score data set including training pitch data; and a training performance data set obtained by the player playing a musical instrument and is not played in the user operation of the performance operator.

An electronic musical instrument includes a progression speed changing unit that changes a progression of transport using a predetermined formula such that a total time required for the transport to pass through a specific step section of musical piece data is not changed; a parameter setting unit that sets a parameter for the predetermined formula; and a musical phrase generator that generates a musical phrase by assigning the parameter set by the parameter setting unit to the predetermined formula based on the progression of the transport changed by the progression speed changing unit.

The teachings described herein are generally directed to a system, method, and apparatus for separating and mixing tracks within music. The system can have a video that is synchronized with the variations in the musical tempo through a variable timing reference track designed and provided for a user of the preselected performance that was prerecorded, wherein the designing of the variable timing reference track includes creating a tempo map having variable tempos, rhythms, and beats using notes from the preselected performance.

An information processing system includes an image obtaining circuit and a display control circuit. The image obtaining circuit is configured to obtain observation images of a first keyboard of a first keyboard instrument. The display control circuit is configured to display, on a display device, the observation images and reference images. The reference images include moving images of at least one hand and one or more fingers of a reference performer who is playing a second keyboard of a second keyboard instrument. The at least one hand and the one or more fingers of the reference performer are displayed overlapping the first keyboard included in the observation images.

The teachings described herein are generally directed to a system, method, and apparatus for separating and mixing tracks within music. The system can have a video that is synchronized with the variations in the musical tempo through a variable timing reference track designed and provided for a user of the preselected performance that was prerecorded, wherein the designing of the variable timing reference track includes creating a tempo map having variable tempos, rhythms, and beats using notes from the preselected performance.

Sound equipment includes: a beat position acquiring unit configured to analyze a beat position of music piece data to be reproduced or acquire an analysis result; and a beat position displaying unit configured to display a scale of a differential numerical value of the number of beats in a plus direction and a minus direction of the music piece data with reference to a currently reproduced position of the music piece data.

Sound equipment includes: a beat position acquiring unit configured to analyze a beat position of music piece data to be reproduced or acquire an analysis result; and a beat position displaying unit configured to display a scale of a differential numerical value of the number of beats in a plus direction and a minus direction of the music piece data with reference to a currently reproduced position of the music piece data.

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.

A method for constructing an adaptive media file comprising a plurality of audio components configured to be used to form an audio output arranged to have a controllable tempo, the method comprising providing first audio data associated with a first audio component of the plurality of audio components, setting a playback tempo range of the first audio data, providing second audio data associated with the first audio component, setting a playback tempo range of the second audio data, wherein the tempo range of the second audio data is different to the tempo range of the first audio data, and associating the first audio data, the second audio data and the respective playback tempo ranges.

Sensory outputs are synchronized to input tempos for providing soothing and other effects for children and other persons. In example embodiments, juvenile products such as rockers and swings have motors that are controlled to produce an oscillatory motion with an adaptive tempo that is synchronized to rhythmic inputs such as a parent's heartbeat. In other example embodiments, juvenile products such as music players are controlled to output signals to play songs via speakers with an adaptive tempo that is synchronized to rhythmic inputs such as an infant's respiratory rate.