Sound apparatus
A sound apparatus is disclosed which can reproduce a wide variety of sound effects. An expansion unit ( 10 ) has a control circuit ( 61 ), an audio circuit ( 62 ), and a speaker ( 63 ). The audio circuit ( 62 ) has a first sound source (SG1)-a fifth sound source (SG5). The control circuit ( 61 ) controls the first to fifth (SG1-SG5) sound sources according to a change in speed information. When the speed information greatly changes over a speed range corresponding to a gear, the reproduction of an acceleration sound or a deceleration sound is interrupted and is started from the beginning according to the number of times that a boundary between speed ranges is crossed.
1 . A sound apparatus to be used in a remote-controlled toy having a controller for outputting manipulation information according to a content manipulated by a user and a toy driven based on the manipulation information, the sound apparatus comprising:
a reproduction device for reproducing a plurality of types of sound data according to a driving state of the toy; and
a control device for analyzing a change in the driving state of the toy based on a change in the manipulation information, and controlling the reproduction device to create sound data according to the change in the driving state of the toy based on a result of the analysis.
2 . The sound apparatus according to claim 1 , wherein the control device detects the change in the manipulation information by comparing past manipulation information with present manipulation information, and when an amount of the change is within a predetermined range, the control device maintains a control of the reproduction device to create the sound data.
3 . The sound apparatus according to claim 1 , wherein the manipulation information includes speed information to express a speed;
the reproduction device is configured to reproduce first sound data to express an acceleration sound and a second sound data to express a deceleration sound; and
the control device detects a change in the speed information as the change in the manipulation information by comparing past speed information with present speed information, and when the present speed information is larger than the past speed information, the control device controls the reproduction device to reproduce the first sound data, and when the present speed information is less than the past speed information, the control device controls the reproduction device to reproduce the second sound data.
4 . The sound apparatus according to claim 3 , wherein when the control device detects that a boundary between predetermined speed ranges is crossed while the past speed information changes to the present speed information, the control device controls the reproduction device to interrupt the reproduction of the first sound data or the second sound data and to reproduce the first sound data or the second sound data from the beginning.
5 . The sound apparatus according to claim 4 , wherein a plurality of speed ranges to be composed of the predetermined speed ranges are set within a range that can be covered by the speed information; and
the control device detects a number of times that a boundary between the predetermined speed ranges is crossed while the past speed information changes to the present speed information and repeatedly controls the reproduction device to interrupt the reproduction of the first sound data or the second sound data and to reproduce the first sound data or the second sound data from the beginning according to the number of times crossed.
6 . The sound apparatus according to claim 4 , wherein
the reproduction device is configured to reproduce third sound data to express a high-speed traveling sound and fourth sound data to express a low-speed traveling sound; and
the control device controls the reproduction device to reproduce the third sound data after the first sound data has been reproduced and controls the reproduction device to reproduce the fourth sound data after the second sound data has been reproduced.
7 . The sound apparatus according to claim 3 , wherein
the reproduction device is configured to reproduce fifth sound data to express a stop state sound, and
when the present speed information indicates a stop state of the toy, the control device controls the reproduction device to reproduce the fifth sound data.
8 . The sound apparatus according to claim 1 , further comprising:
an output device for outputting an audio signal based on the sound data; and
a speaker driven by the audio signal.