A content data generating device includes a first storage configured to store content data including at least either video information or audio information, a second storage configured to store variation data representing change of a parameter on the content data, a designator configured to designate a portion of the variation data, and a content data generator configured to process the content data according to a value of the parameter of the portion of the variation data designated by the designator to generate processed content data.

An electronic device and a method for reproducing a sound in the electronic device are provided. The electronic device includes a touchscreen displaying a keyboard having a plurality of keys and a plurality of sound source buttons corresponding respectively to a plurality of different sound sources, a processor connected electrically to the touchscreen, and a memory connected electrically to the processor, wherein the memory stores instructions that are executed to cause the processor to perform control such that when an input to at least one key among the plurality of keys is received, the sound source corresponding to at least one sound source button selected among the plurality of sound source buttons is reproduced as a sound corresponding to the received input.

A first input section is used for inputting first tone data, and a first output section is connected to the first input section via a first path. A second input section is used for inputting second tone data, and a second output section is connected to the second input section via a second path. A tone processing module performs tone processing on the tone data, and a processor is configured to insert the tone processing module into the first and second paths in response to selection of first and second modes, respectively. The tone processing module performs the tone processing on the first tone data in the first mode, and performs the tone processing on the second tone data in the second mode. The above allows connection of the module to be set easily in response to the selected mode.

A content data generating device includes a first storage configured to store content data including at least either video information or audio information, a second storage configured to store variation data representing change of a parameter on the content data, a designator configured to designate a portion of the variation data, and a content data generator configured to process the content data according to a value of the parameter of the portion of the variation data designated by the designator to generate processed content data.

An electronic device and a method for reproducing a sound in the electronic device are provided. The electronic device includes a touchscreen displaying a keyboard having a plurality of keys and a plurality of sound source buttons corresponding respectively to a plurality of different sound sources, a processor connected electrically to the touchscreen, and a memory connected electrically to the processor, wherein the memory stores instructions that are executed to cause the processor to perform control such that when an input to at least one key among the plurality of keys is received, the sound source corresponding to at least one sound source button selected among the plurality of sound source buttons is reproduced as a sound corresponding to the received input.