JPS63155193U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a diagram suitable for understanding this invention, Fig. 2 is an overall perspective view of an electronic stringed instrument according to an embodiment of this invention, Fig. 3 is a cross-sectional view along a line showing an example of the configuration of a frett switch, and Fig. 4 Figure 5 shows an example of the configuration of a string trigger switch - line cross-sectional view, Figure 5 shows the overall circuit configuration, Figure 6 shows the general flow of the microcomputer, Figure 7 is suitable for understanding the string trigger detection function. Figure 8 is a diagram suitable for understanding the lingering function of strings, Figure 9 is a diagram suitable for understanding the silencing function due to the passage of sound time, Figure 10 is a diagram suitable for understanding the miute function, Figure 11 is a diagram showing an example of the configuration of a latch circuit, Figure 12 is a diagram showing registers related to string trigger detection, Figure 13 is a detailed flowchart of string trigger detection processing, and Figure 14 is related to resetting the latch circuit. Flowchart of the interrupt routine; FIG. 15 is a diagram showing the sound source control register; FIG. 16 is a detailed flowchart of the assignment/sound generation process in FIG. 13; FIG. 17 is a flowchart of setting the sound generation time; FIG. 18 Figure 19 is a flowchart of an interrupt routine related to sound generation time control, Figure 19 is a detailed flowchart of fret state detection processing, Figure 20 is a detailed flowchart of frequency change processing in Figure 19, and Figure 21 is a detailed flowchart of frequency change processing in Figure 19. FIG. 22 is a flowchart for inputting the mode changeover switch when strings are removed, FIG. 22 is a flowchart for inputting the mute switch, and FIG. 23 is a detailed flowchart for silencing all sound sources in FIG. 22. DESCRIPTION OF SYMBOLS 1...Body part, 4...Strings, 5c...Mode changeover switch when strings are removed, 8...Finger board, 30...Microcomputer, 60...Tone generating circuit, TSW...String trigger switch, FSW...Fretswitch.

Claims (1)

[Claim for Utility Model Registration] At least one string is stretched on the body of the musical instrument, and this at least one string is provided with a string trigger switch that detects the start of vibration of the string, and a string trigger switch is installed on the finger board. is provided with a fret state sensing means for sensing the fret operation position with respect to the string,
When the start of vibration of the string is detected by the string trigger switch, the musical tone of the string at which the string vibration has started is started to be produced at a pitch corresponding to the fret operation position detected by the fret state sensing means. type of electronic stringed instrument, when the fretting position of the string is detected by the fretting state sensing means to change while the string is producing a musical tone for which string vibration has started, the musical tone being produced is muted. pitch changing means for changing the pitch to a pitch corresponding to a fretted operating position after the change; When the fret position sensing means detects that the fret position has also changed to the open state, a start string silencing means for controlling the silencing of the musical tone being produced, and a string release mode changeover switch provided on the instrument body. and, when the fret state sensing means detects that any fret position related to the string has changed to an open state while the string is producing a musical tone for which string vibration has started, the pitch changing means and selection means for determining which of the open string silencing means to give priority according to the mode specified by the mode changeover switch when strings are removed.