Abstract: A karaoke device with built-in microphone includes a main body microphone, and converts an audio signal from the microphone into audio data by an A/D converter, and writes the audio data into a ring buffer by mixing with the data already stored in the ring buffer. If an echo mode is set, a delay time constant (CD) corresponding to the echo mode is determined, and on the basis thereof, a size of the ring buffer is set. The data is read from the ring buffer, and is inputted in a sound channel. If a voice effect mode is set, a reproduction frequency constant (CF) corresponding to the voice effect mode is determined, and based thereon, an inclement value of a read pointer of the ring buffer is determined, and then, the data is read from an address indicated by the read pointer. When the read pointer reaches the delay time constant, the relevant constant is subtracted from the read pointer value.

Abstract: A ball paddle game apparatus (10) has a game machine (12) connected to a television monitor. (18). A paddle key (28a-28d) is provided on a game machine (12). On the game screen of the monitor, a ball moves on the ball movement route in the number corresponding to the number of paddles. A paddle is displayed on the moving route. At the push of a paddle key (28), the corresponding paddle hits the ball. If the timing of operating a paddle key (28) and the timing of a ball movement agrees, then it is a success. If not, then it is a failure.

Abstract: A soccer game apparatus includes a game processor, and the game processor allows at least a character of a soccer ball to be displayed on a television monitor screen. An signal outputting device is attached to a player's leg, and when the player moves the leg, an acceleration correlation signal correlated with an acceleration as of that time is output from the signal outputting device. Upon receipt of the acceleration correlation signal by an infrared signal, for example, the game processor causes a change to the character of the soccer ball displayed on the screen.

Abstract: A musical scale recognition apparatus includes an analog/digital converter and a processor, and can determine by the processor how close an input analog audio signal is to a musical scale of a musical tone to be recognized by repeatedly performing a calculation of a cumulative value As to find a coefficient of a Fourier sine series of the audio signal on the basis of a frequency f and digital data D, a cumulative value Ac to find a coefficient of a Fourier cosine series of the audio signal on the basis of the frequency f and the digital data D, and a frequency power spectrum effective value A of the audio signal on the basis of the cumulative value As and the cumulative value Ac, wherein the digital data into which the input analog audio signal is converted by the analog/digital converter is D, the frequency (musical scale) of the musical tone to be recognized is f, and a current time is t.

Abstract: A memory cartridge system includes a main body, and a main body ROM incorporated in the main body is stored with a warning message display program, and a memory cartridge attachable to or detachable from the main body is stored with a karaoke program. When the memory cartridge is not attached, the warning message display program is mapped to an address space in a first manner, whereby the warning message display program is started. On the other hand, when the memory cartridge is attached, the warning message display program and the karaoke program are mapped to the address space in a second manner, whereby the karaoke program can be started.

Abstract: A karaoke device with built-in microphone includes a main body microphone, and converts an audio signal from the microphone into audio data by an A/D converter, and writes the audio data into a ring buffer by mixing with the data already stored in the ring buffer. If an echo mode is set, a delay time constant (CD) corresponding to the echo mode is determined, and on the basis thereof, a size of the ring buffer is set. The data is read from the ring buffer, and is inputted in a sound channel. If a voice effect mode is set, a reproduction frequency constant (CF) corresponding to the voice effect mode is determined, and based thereon, an inclement value of a read pointer of the ring buffer is determined, and then, the data is read from an address indicated by the read pointer. When the read pointer reaches the delay time constant, the relevant constant is subtracted from the read pointer value.