Abstract: The present disclosure provides a performance apparatus capable of changing to a performance pattern making a musically natural transition. A CPU 13 determines which stage a performance pattern of each of tracks Tr (1) to (4) currently selected belongs to, and obtains the number of performance patterns for each stage, in accordance with depression of a transition button. The CPU 13 determines that the stage having the maximum number of performance patterns is the “current stage” among the number of performance patterns for each stage obtained, and changes the performance pattern of each of the tracks Tr (1) to (4) to the stage subsequent to the determined “current stage”. Therefore, the performance pattern can be changed into a performance pattern making a musically natural transition. As a result, even a beginner user being poor in music knowledge can set an appropriate performance pattern matching the transition of the song.

Abstract: Signals in two different bands (band components) are extracted from an input signal by an HPF and a BPF, and frequency-shift processing is performed by an MPY. Further, in order to adjust levels of an interface between the band components of shifted frequency to a high-frequency band side and the input signal, band components with which the input signal is adjacent to the high-frequency band extension components are extracted by an HPF. Then, a gain is controlled on the basis of the output values from the HPF and the HPF so as to reduce a difference between the components of shifted frequencies and the level of the input signal by the level correction coefficient calculating unit and the MPY. Then, the shifted components are added to the high-frequency band of the input signal by an ADDER.

Abstract: Digital complex tone generators include a first tone generator configured to generate a first digital tone with selectable first characteristics including a first frequency, a first phase, and a first amplitude; a second tone generator configured to generate a second digital tone with selectable second characteristics including a second frequency, a second phase, and a second amplitude; and a generator adder configured for combining the first tone and the second tone to provide a digital complex tone with programmable characteristics. Corresponding methods include initializing a first and second tone generators based on, respective, selected frequencies, phases, and amplitudes; iteratively generating a first digital tone and a second digital tone; and combining these two tones to provide the digital complex tone.

Abstract: To store main information with associated additional information incorporated therein, data constituting the additional information is divided into a plurality of small-size data pieces of, e.g., one bit. Then, the respective values of particular ones of predetermined data units (e.g., bytes) constituting the main information are subjected to arithmetic operations in accordance with a predetermined algorithm containing the value of each of the data pieces as a parameter. In this way, the respective values of the particular data units in the main information are modulated in accordance with the values of the individual data pieces in the additional information; at that time, only some of the data unit values are altered with the others left unaltered. The thus-arithmetically-operated main information is stored into a storage.

Abstract: Method and apparatus reduce the memory capacity needed to store control codes used to obtain specified frequency values that represent musical tones with a predetermined relationship. The predetermined relationship of the musical tones allows a dual-tone melody generating music box to play melodies two notes at a time. A six-bit code is used to instruct a frequency divider how to divide a master frequency into each desired musical tone.

Abstract: An apparatus for detecting the number of beats in that second time measuring means starts to measure time from a time point when the level of a predetermined frequency component of an input audio signal is once higher than a predetermined level and, after a predetermined period T1 elapses from the time point, the measurement of time by the second time measuring means is terminated at a time point when the level of the predetermined frequency component of the input audio signal is again higher than the predetermined level, thereby to convert a measured period T2 at termination of measuring of the second time measuring means into BPM i.e., the number of beats per predetermined unit time regarding as a unit beat.