Systems, devices, media, and methods are presented for playing audio sounds, such as music, on a portable electronic device using a digital color image of a note matrix on a map. A computer vision engine, in an example implementation, includes a mapping module, a color detection module, and a music playback module. The camera captures a color image of the map, including a marker and a note matrix. Based on the color image, the computer vision engine detects a token color value associated with each field. Each token color value is associated with a sound sample from a specific musical instrument. A global state map is stored in memory, including the token color value and location of each field in the note matrix. The music playback module, for each column, in order, plays the notes associated with one or more the rows, using the corresponding sound sample, according to the global state map.

A parameter control device according to an embodiment includes a value acquiring unit and a parameter output unit. The value acquiring unit acquires an indicating value of a first operation element. The parameter output unit outputs a plurality of parameter values corresponding to the acquired indicating value, based on setting information and a correspondence relation between the indicating value and a coordinate in an area defined by a plurality of coordinate axes. The setting information is for setting a relation between a plurality of parameter values and a coordinate. The plurality of parameter values being for controlling a state of content.

A sound source for an electronic percussion instrument and sound production control method thereof are provided. An electronic drum sound source device performs a weighting operation on four pieces of waveform information (pitch envelope, amplitude envelope, start phase) stored in a waveform table according to the beating conditions (hitting point position, velocity) based on the output from a struck sensor of an electronic drum pad. The electronic drum sound source device creates a sine wave on the basis of the waveform information whereon the weighting operation was performed, and generates musical sounds (sounds of percussion instrument) by synthesizing the sine wave with the waveforms of residual waveform data whereon the weighting operation was performed. The sine wave is not synthesized with waveform data other than the residual waveform data, and thus consistent musical sounds with no phase interference can be reproduced.

An electronic percussion instrument and a hitting detection method are provided. The electronic percussion instrument includes: a head of which an upper surface is formed as a hitting surface; a body part, which is cylindrical and has an opening at an upper end side, the opening is covered by the head; and a plurality of head sensors provided on an inner peripheral side of the body part and detects a hitting on the hitting surface. The plurality of head sensors are in contact with a lower surface of the head in an area in which a distance from a center of the hitting surface is 50% or more and 75% or less of a radius of the hitting surface.

An electronic percussion instrument capable of simulating a rendition of an acoustic percussion instrument is provided. The electronic percussion instrument includes a housing, a percussion surface attached to the housing, a pressure sensor disposed on a central section of the percussion surface on a side of the back surface and configured to detect pressing against the central section, a head vibration sensor disposed on a peripheral section of the percussion surface on the side of the back surface and configured to detect vibrations of the peripheral section, and a rim vibration sensor disposed at a position overlapping the head vibration sensor when seen in a plan view of the percussion surface and configured to detect vibrations of the housing.

A musical sound producing apparatus includes a plurality of keys; a sound production information generator configured to generate sound production information for producing a musical sound based on a first key operation on any key among the plurality of keys; a control information generator configured to generate control information for controlling, on the basis of a second key operation different from the first key operation, a mode of the musical sound produced on the basis of the first key operation; and a musical sound signal generator configured to generate a musical sound signal on the basis of the sound production information and the control information.

An input interface device includes at least one processor. The processor performs control to cause, among light emitters, a first light emitter corresponding to a contact/proximity point detected by a detector to emit light with a luminous intensity higher than that of a remaining light emitter. The contact/proximity point is where an object is in contact with or in proximity to a detection surface. The processor further performs control, while the object is moving along the light emitters in a state in which the object is in contact with or in proximity to the detection surface, to gradually reduce a luminous intensity of, among the light emitters, a second light emitter corresponding to a point where the object being in contact with or in proximity to the detection surface once detected by the detector is no longer detected to put out the second light emitter in a predetermined time.

Disclosed is an electronic device including: a display; a detector that detects contact or proximity between an operating body and a detection surface; multiple light emitters that are provided at a position corresponding to the detector, and cause the detection surface to emit light; and at least one processor. The processor performs control to link displaying regarding at least part of a content on the display with light emission of at least part of the light emitters.

An keytar (1) includes a keyboard (2) on which a plurality of keys (2a) are arranged, a ribbon (5) in which a front surface panel (81) is arranged, and the degree of the same type of musical sound effect applied to each of tones (A-D) produced by the key (2a) is changed corresponding to detection positions in an X-direction in the front surface panel (81). Accordingly, because the degrees of the musical sound effects can be respectively changed for each of the tones (A-D) corresponding to the detection positions in the X-direction of the front surface panel (81), for the change of the same type of musical sound effect toward the tones (A-D), the monotony of this change can be suppressed and an expressive performance can be achieved.

A controller device for the production of electronic music includes multiple control surfaces, including a touch sensitive display and a matrix of actuator pads, each of which are capable of operating in different modes simultaneously.