Electronic musical instrument of waveform memory reading type
AssigneeNippon Gakki Seizo Kabushiki Kaisha
InventorTakatoshi Okumura
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Abstract
An electronic musical instrument includes a plurality of address generators for producing address signals corresponding to different tones each varying at a rate synchronous with the frequency of each of the different tones, a waveform memory device including a plurality of addresses for storing at respective addresses a plurality of waveform sample values that constitute a waveform, a circuit for sequentially supplying one after another of the address signals to the waveform memory device to read out the waveform in different rates in a time division multiplexed manner for different tones, and musical tone forming circuits for forming musical tones in accordance with the time division multiplexed waveform outputs of the waveform memory device.
Claims10
An electronic musical instrument comprising:
- a plurality of address generators for respectively producing address signals corresponding to different tones, each of said address signals being varied at a rate synchronous with the frequency of the corresponding one of said different tones;
- a waveform memory device including a plurality of addresses for respectively storing a plurality of waveform sample values that constitute a waveform at respective ones of said addresses;
- means for sequentially supplying one after another of said address signals sent from said address generators to said waveform memory device so that said waveform is read out at different rates in a time division multiplexing manner respectively corresponding to said address signals supplied for said different tones to be produced;
- and
- musical tone forming means for forming musical tones in accordance with respective time division multiplexed waveform outputs from said waveform memory device.
An electronic musical instrument comprising:
- a plurality of address generators for producing address signals corresponding to different tones, said address signals being produced at rates respectively synchronous with frequencies of the respective tones;
- an address counter for sequentially producing a plurality of address signals by counting a high speed clock;
- means for forming a plurality of waveform sample values which form musical tone waveforms to be formed based on outputs of said address counter;
- a plurality of conincidence circuits which check coincidences of the address counter outputs and respective address signals of said address generators;
- means responsive to each of the outputs of the respective coincidence circuits for selecting one of the waveform sample values;
- and
- musical tone forming means for forming musical tones according to the outputs of said selecting means.
Dependencies are inferred from the claim text.