Tone generating apparatus with FM sound source and PCM sound source
AssigneeYamaha Corporation
InventorAkira Ikeya
Life of this patent
Estimating the term…
Abstract
A tone generating apparatus for connection to a control device has a tone signal-generating block having a plurality of tone signal-forming circuits that form tone signals in respective tone signal-forming manners. A determining block determines to which of the plurality of tone signal-forming circuits control data delivered from the control device is to be supplied. A control data supply block supplies the control data to a corresponding one of the plurality of tone signal-forming circuits of the tone signal-generating block, depending upon a result of the determination by the determining block.
Claims8
A tone generating apparatus for connection to a control device that outputs selecting data for selecting one of a plurality of different tone signal-forming methods and control data for controlling of the selected tone signal-forming method, comprising:
- a tone signal-generating block having a plurality of tone signal-forming circuits that respectively form tone signals in accordance with said plurality of different tone signal-forming methods based on said control data;
- a determining block that detects said selecting data delivered from said control device and determines to which of said plurality of tone signal-forming circuits said control data delivered from said control device is to be supplied, depending upon a result of said detection;
- and
- a control data supply block that supplies said control data to a corresponding one of said plurality of tone signal-forming circuits of said tone signal-generating block, depending upon a result of said determination by said determining block.
A tone generating apparatus for connection to a bus of a personal computer, said tone generating apparatus being supplied with selecting data and control data via said bus from said personal computer to generate a tone signal, comprising:
- a sound source LSI having an FM sound source block and a PCM sound source block;
- an interface that receives control data for controlling said PCM sound source block from said bus;
- a CPU connected to said interface for decoding said control data input via said interface;
- a selector that selectively connects said sound source LSI to one of said bus and said CPU;
- registers corresponding respectively to said FM sound source and said PCM sound source of said sound source LSI;
- and
- a changeover control block that receives said selecting data, for selecting one of said FM sound source block and said PCM sound source block, and operates under control of said CPU for causing said selector to connect said sound source LSI to said bus when one of said registers corresponding to said FM sound source block is accessed according to said selecting data supplied through said bus by said personal computer, and for causing said selector to connect said sound source LSI to said CPU when said interface is accessed according to said selecting data supplied through said bus by said personal computer.
Dependencies are inferred from the claim text.