Abstract: Methods and systems for simulating the natural tempo of humans are provided. The method utilizes multiples of a basic unit of duration, or quantum unit, of human timing. Unconscious, but precise, compensations occur through imperceptible changes in the timing quantum level. An application of natural human tempo to improve the basic metronome function by humanizing it is also provided. Other ramifications of human tempo simulation are also discussed, including robots and computer games and graphics.

Abstract: A music reproducing system includes a musical instrument for reproducing a music tune on the basis of the MIDI music data, a sound reproducer for reproducing a music tune and/or narration from audio data codes and a server computer for distributing programs, MIDI files and audio files to the musical instrument and sound reproducer, and a program contains plural music tunes and narration; while a program is being reproduced in collaboration between the musical instrument and the sound reproducer, the audio data codes are converted to an audio signal expressing the narration through the sound reproducer, and the music tunes are reproduced on the basis of the MIDI files through the musical instrument; and the duration data codes of audio file are supplied to the musical instrument so as to make the musical instrument and the sound reproducer synchronized with each other.

Abstract: An acoustic drum set amplifier specifically calibrated for each instrument within a drum set, specifically a snare drum, a bass drum, a bongo drum, tom-tom drum, a hi-hat, ride cymbal and crash cymbals, for optimizing the sound frequency of the instrument. In operation, an artist using the device might be able to filter, blend, and manipulate an electro-acoustic signal associated with an acoustic drum instrument, either captured by a microphone or generated by an electronic drum module to the artist's preferences while monitoring the sound directed towards an audience at a live performance.