US5300728A
Expired / Lapsed
US
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Method and apparatus for adjusting the tempo of auto-accompaniment tones at the end/beginning of a bar for an electronic musical instrument
Assignee: Kawai Musical Instruments Manufacturing Co Ltd
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Filing: 1992-08-21
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Granted: 1994-04-05
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Expires: 2012-08-21
Abstract
Abstract This invention discloses an electronic musical instrument incorporating an auto-accompaniment apparatus, which can desirably set a tempo of rhythm accompaniment tones (e.g., chord, bass, and drum accompaniment tones) using a tempo preset button or an increment/decrement button during a play operation. The read speed of an auto-accompaniment data memory is determined on the basis of the set tempo. A tempo controller for switching from the current tempo to a new tempo upon detection of a division of a bar of auto-accompaniment data is arranged, thereby eliminating uneasy feeling upon switching of tempo.
Inventors
- 👤 Yoshihisa Shimada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:52
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/36; G10H1/40; G10H1/42; G10H2210/00; G10H2210/375; G10H2210/381
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
176 words
An auto-accompaniment apparatus comprising: an auto-play data memory means for storing auto-accompaniment data in units of bars, the auto-accompaniment data having different tempo data for different kinds of rhythm; waveform memory means for storing a plurality of tone generating waveform data corresponding to the auto-accompaniment data stored in said auto-play data memory means; tone generator means for reading out tone generation waveform data from said waveform memory means on the basis of the auto-accompaniment data read out from said auto-play data memory, and outputting the readout waveform data as tone signals; tempo setting means for setting a replacement tempo for a current tempo to modify or change a reading speed of the auto-accompaniment data from said auto-play data memory means; and tempo controller means for detecting an end of a bar in the current tempo in response to initiation of said tempo setting means and changing a current tempo to the replacement tempo set by said tempo setting means such that the tempo of the auto-accompaniment data is not changed in the middle of a bar.
Claim 2
Dependent Claim
176 words
An auto-accompaniment apparatus comprising: an auto-play data memory means for storing auto-accompaniment data in units of bars, the auto-accompaniment data having different tempo data for different kinds of rhythm; waveform memory means for storing a plurality of tone generating waveform data corresponding to the auto-accompaniment data stored in said auto-play data memory means; tone generator means for reading out tone generation waveform data from said waveform memory means on the basis of the auto-accompaniment data read out from said auto-play data memory, and outputting the readout waveform data as tone signals; tempo setting means for setting a replacement tempo for a current tempo to modify or change a reading speed of the auto-accompaniment data from said auto-play data memory means; and tempo controller means for detecting an end of a bar in the current tempo in response to initiation of said tempo setting means and changing a current tempo to the replacement tempo set by said tempo setting means such that the tempo of the auto-accompaniment data is not changed in the middle of a bar.
Claim 3
Dependent Claim
47 words
An auto-accompaniment apparatus according to claim 1, wherein said tempo setting means comprises rhythm selection means for presetting a selected one of the auto-accompaniment data and a preset tempo button for determining the replacement tempo with tempo data contained in said selected one of the auto-accompaniment data.
Claim 4
Dependent Claim
27 words
An auto-accompaniment apparatus according to claim 1, wherein said tempo setting means further comprises tempo adjustment means for incrementing/decrementing tempo as set by said tempo setting means.
Claim 5
Independent Claim
126 words
A method for adjusting tempo of auto-accompaniment data comprising: storing the auto-accompaniment data in units of bars, the auto-accompaniment data having different tempo data for different kinds of rhythm; storing tone generating waveform data corresponding to the auto-accompaniment data; reading out the tone generation waveform data based on the auto-accompaniment data, and outputting the readout waveform data as tone signals; setting a replacement tempo for a current tempo to modify or change a reading speed of the auto-accompaniment data; and after said tempo setting step, detecting an end of a bar in the current tempo using a tempo controller and changing the current tempo into the set replacement tempo such that the tempo of the auto-accompaniment data is not changed in the middle of a bar.
Claim 6
Independent Claim
126 words
A method for adjusting tempo of auto-accompaniment data comprising: storing the auto-accompaniment data in units of bars, the auto-accompaniment data having different tempo data for different kinds of rhythm; storing tone generating waveform data corresponding to the auto-accompaniment data; reading out the tone generation waveform data based on the auto-accompaniment data, and outputting the readout waveform data as tone signals; setting a replacement tempo for a current tempo to modify or change a reading speed of the auto-accompaniment data; and after said tempo setting step, detecting an end of a bar in the current tempo using a tempo controller and changing the current tempo into the set replacement tempo such that the tempo of the auto-accompaniment data is not changed in the middle of a bar.
Claim 7
Dependent Claim
36 words
The method of claim 4, wherein said tempo setting step includes presetting a selected one of the auto-accompaniment data and determining the replacement tempo with tempo data contained in the selected on of the auto-accompaniment data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |