Automatic music playing system
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHaruto Teshima, Toshiaki Inui
Life of this patent
Estimating the term…
Abstract
An automatic music playing system including a matrix circuit and manual play switches both connected to tone signal generators, each of said manual play switches consisting of a series connection of a resistor and a switch and a capacitor connected between the interconnection of said resistor and switch and the input terminal of a corresponding tone signal generator so that the output signals of said matrix circuit is absorbed in said capacitor when said switch is closed and an on-off switch operation triggers the corresponding tone signal generator, and each of said tone signal generators including two oscillating transistors connected with a feed-back loop and provided with a damping resistor.
Claims5
An automatic music playing system comprising:
- a tempo signal generating circuit for generating a pulse signal determining the tempo of an automatically played rhythm;
- a frequency divider circuit including a plurality of flip-flop circuits having output terminals in cascade connection with said tempo signal generating circuit for dividing the frequency of the pulse signal of said tempo signal generating circuit;
- a matrix circuit connected to the output terminals of said plurality of flip-flop circuits and having output terminals for generating a plurality of driving signals of predetermined patterns;
- a plurality of tone signal generating circuits connected to the output terminals of said matrix circuit for producing tone signals for rhythm sounds of musical instruments based on the driving signals from the matrix circuit;
- a voltage source;
- a plurality of manual play switch circuits provided between said matrix circuit and corresponding tone generating circuits, each said manual play switch circuit comprising means having an off-state to allow the driving signal from the matrix circuit to trigger the corresponding tone signal generating circuit, an on-state for clamping the matrix output to prevent the driving signal from triggering the tone signal generator circuit, and a momentary on-off state to provide a manually generated trigger signal for said tone signal generating circuit, each switch circuit comprising a series-connected manual switch and capacitor connected in parallel with an output of said matrix circuit, and a resistor connected between said voltage source and the junction of said manual switch and said capacitor;
- an amplifier circuit connected to outputs of said tone signal generating circuits for amplifying and mixing tone signals produced by the tone signal generating circuits;
- and
- a loudspeaker system connected to outputs of said amplifier circuit for converting the tone signals into sound waves.
Dependencies are inferred from the claim text.