Abstract: A musical sound generation device including a blowing pressure sensor which detects a blowing pressure, a key switch which specifies a sound pitch of a musical sound, a first sound source which outputs a first signal corresponding to an exhalation sound, a second sound source which outputs a second signal corresponding to the musical sound having the sound pitch specified by the key switch, and a processor which starts output of the first signal by the first sound source on basis of an operation performed on the key switch, starts output of the second signal by the second sound source on basis of the blowing pressure, and controls a sound volume when the exhalation sound resulting from the first signal is emitted and a sound volume when the musical sound resulting from the second signal is emitted, on basis of the blowing pressure.

Abstract: The invention relates to a method and a circuit (500) for generating a sub-harmonic of a periodic signal (100). Conventional methods of generating sub-harmonics of a periodic signal, e.g. for bass enhancement of audio signals, create considerable artefacts. This affects the timbre, the color of the audio signal. The invention presents a method of generating a sub-harmonic of a periodic signal (100) which, added to the original audio signal, produces a more natural audio signal with bass enhancement. In a first embodiment of the invention, the signal (100) is clipped at a first predetermined level (a) in every second period (116) of the signal when the amplitude of the signal is larger than a second predetermined level. In a second embodiment of the invention, the signal is clipped at a second level (a) in every first period (115) and at a third level (b) in every second period (116) of the signal, provided that the signal level exceeds a first predetermined level.

Abstract: A method is designed for controlling a plurality of tone generating drivers by an integrating driver installed in an operating system to generate music tones according to performance data created by a music application software. In the method. the performance data created by the music application software is inputted into the integrating driver through an application program interface provided by the operating system. The performance data is distributed from the integrating driver to one or more of the tone generating drivers provisionally registered to the integrating driver. The registered tone generating driver is operated to generate waveform data of a music tone at a specific sampling frequency based on the distributed performance data. The waveform data is streamed back from the registered tone generating driver to the integrating driver. The specific sampling frequency of the streamed waveform data is converted into a common sampling frequency by the integrating driver.

Abstract: This patent application describes a low-power electronic music synthesizer (1) which may be combined with a radio transmitter (2) for use in audio-kinetic sculptures or toys. The invention consists of a low-voltage circuit implementing a multiple voice analog music synthesizer utilizing digital CMOS invertors biased in their linear regions as push-pull amplifiers and field-effect transistors as parameter controlling elements. Because of the low-voltage operation, a charge-pump is required to produce a negative control voltage for the field-effect transistors. Variations in sound are produced by touching metal contacts (3,4,5,6,7,8,9,10) which are sensitive to the range of resistance and capacitance of human fingertips. The combination of low-voltage, low-power, high-fidelity sound generation and touch-sensitive controls make this ideal for a new kind of toy. Due to the low-voltage and low-power requirements, the circuit can operate for approximately forty hours using two 1.5 volt AA cells.

Abstract: The present invention pertains to audio equipment simulative of musical instruments. The invention allows a user to simulate the playing of music reproduced from an external audio source. The present invention allows a user to quickly modify the amplification of a given audio band pass frequency by selecting a first trigger associated with that band pass frequency, and subsequently activating a second trigger to modify the selected band pass frequency. The present invention has an decorative and functional appearance which may simulate any musical instrument, such as a guitar.

Abstract: A method and apparatus for analyzing and reducing or increasing the dissonance of an electronic audio input signal are realized by identifying the partials of the audio input signal by frequency and amplitude. The dissonance of the input partials is calculated with respect to a set of reference partials according to a procedure disclosed herein. One or more of the input partials is then shifted, and the dissonance re-calculated. If the dissonance changes in the desired manner, the shifted partial may replace the input partial from which it was derived. An output signal is produced comprising the shifted input partials, so that the output signal is more or less dissonant that the input signal, as desired. The method may be used with computerized sound processing equipment, e.g., MIDI-based equipment. The input signal and reference partials may come from different sources, e.g.

Abstract: A transient discriminate harmonics generator which receives an audio input signal and produces an output signal containing harmonics of the input signal. The output signal is amplitude shaped as a function of the input signal's time and amplitude envelope.

Abstract: A musical tone synthesizing apparatus has a closed-loop configuration including an adder, a filter and a delay circuit. The adder adds its feedback signal to a signal to be synthesized which is applied from an external device. The filter constructed as the all-pass filter has a frequency characteristic by which a phase delay between its input and output signals is varied in response to a frequency variation of its input signal. Such all-pass filter includes a delay element having a delay time which is set longer than a predetermined unit delay time corresponding to a sampling period to be employed. Herein, the output of adder is fed back to the adder via the all-pass filter and delay circuit as the feedback signal. Thus, a signal circulating the closed-loop is picked up as a synthesized musical tone signal.

Abstract: A musical tone synthesizing apparatus is disclosed wherein an excitation signal corresponding to performance data is generated and supplied to a loop circuit. In the loop circuit, this excitation signal is delayed for at least a fixed time period and a repeatedly circulating muscial tone signal is generated. At the beginning of the generation of this musical tone signal, a initial signal with a frequency which corresponds to the pitch of the generated musical tone is supplied. As a result of this, in the loop circuit, resonant operation is carried out quickly in accordance with the initial signal.

Abstract: A sound effector for changing original sound signals generated from an electric musical instrument and picked up by a pickup element. The effector having an inductance circuit into aurally improved distinctive sounds by suitably distorting the waveform in a frequency band or original sound signals to be enhanced during amplification of the original sound signals. The sound effector includes a resonance circuit having a capacitor connected with the inductance circuit of the pickup element, an amplifier circuit composed of semiconductor elements for amplifying an output signal from the resonance circuit, a filter circuit for receiving the output signal from the amplifier circuit and for passing therethrough a signal having a predetermined frequency range, and a positive feedback circuit for positively feeding back a part of the signal passed through the filter circuit to the resonance circuit.