Touch Detecting Device, Electronic Musical Instrument and Touch Detecting Method

Abstract

The invention provides a touch detecting device, an electronic musical instrument and a touch detecting method. First and third counters count an ON time between first and second contact nodes of a key and an ON time between the second contact node and a third contact node, respectively. A second counter counts a time after counting of the first counter is completed. A counter memory stores velocity counter values representing count times of the first and third counters, and a correction time counter value representing the count time of the second counter. An arrival comparator circuit compares an arrival time value and the correction time counter value. In a case that the velocity count value of the first counter is larger than a threshold value, when the arrival comparator circuit detects that the arrival time value coincides with the correction time counter value, a controller outputs a sound generation instruction including touch information according to the velocity counter value loaded from the counter memory to a CPU.

Description

Technical field [0001] The present invention relates to a device and method for detecting a touch operation of a keyboard of an electronic musical instrument, and an electronic musical instrument. Background technique [0002] Generally, for the velocity detection of the keyboard of an electronic musical instrument, the difference in the on-time of two switches (contacts) that are set under the keyboard and turned on with different pressing amounts (stroke) is measured, and It is very common to use it as speed information. The measurement is started when the first switch is turned on, and the measurement is completed when the second switch is turned on. Based on the intensity of the key pressed from the measured data, the tone color and volume of the sound source are controlled to perform sound processing ( For example, the technique described in JP 2013-195647 A). [0003] In recent years, a prior art has also been proposed, that is, adding another switch to the middle stroke po...

AI Technical Summary

Problems solved by technology

[0006] However, in the prior art of electronic keyboard musical instruments, if the keyboard is not pressed to the depth of the position where the 3rd switch is provided, it is not regarded as the action of pressing the key.

Therefore, there are problems as follows: no sound is produced against the player's intention, and the key press detection performance and connection flexibility are impaired.

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