TH101067A - The work process of a digital computer to calibrate the dulcimer - Google Patents

Abstract

DC60 digital computer workflow to calibrate the dulcimer Crafted for use Comparing the sound of the 7-band Thai dulcimer by virtue of the theoretical principle of the Thai music level together with the Processing by computer It consists of a microphone that is connected to a computer to record audio from a microphone. Checking the conditions of the recorded signal, optimizing the signal level to reduce the distortion due to weak or too strong stripping, low and high pass filtering to eliminate interference. High-Q filtering to determine whether the frequency of Does the sound signal from the dulcimer match the standard frequency of that sound level? By accuracy Of sound calibration is determined by the status display color displayed on the computer screen. Where the gray indicator color means the signal waiting state, green means valid state and red means invalid state. In this state, arrows are also displayed at the top of the status color. To guide the players Whether the strap should be tighter or lowered By observing the direction of the arrow that appears The work process of a digital computer to calibrate the dulcimer Crafted for use Comparing the sound of the 7-band Thai dulcimer by virtue of the theoretical principle of the Thai music level together with the Processing by computer It consists of a microphones that are connected to a computer, a computer to record audio signals from a microphone. Detection of recorded signal conditions Optimized signal level to reduce fluctuations due to weak or too strong streaking, low and high frequency filtering to eliminate interference. High-Q filtering to determine whether the frequency of Does the sound signal from the dulcimer match the standard frequency of that sound level? By accuracy Of sound calibration is determined by the status display color displayed on the computer screen. The color of the indicator color means the waiting state, green means valid state and red indicates invalid state In this state, an arrow appears at the top of the status color as well. For guidance for the players to know Whether the line should be taut or loose By observing from the direction of the arrow that appears

Claims (1)

1. The operation of the digital computer in calibrating the sound of the khim is characterized by the following: it consists of a computer (2) and a microphone (1). The microphone (1) is connected to the computer (2), with the microphone (1) placed near the sound box or doll (3) of the khim (4). It has a special characteristic: the sound signal from the microphone (5) goes into the recording section (6) to record the sound signal and check the conditions in terms of loudness level and the number of data points of the recorded sound signal, as well as adjust the signal level to be appropriate (7) before entering the low and high frequency filtering process (8) to eliminate noise and entering the Q-value filtering section (9), which allows only signals with frequencies that match the standard frequencies of each pitch level to pass through. The amplitude of the signal that passes through is determined using the FFt analysis technique. The amplitude of the signal is used to check (10) the accuracy of the calibration by comparing it to the specified level. The indication of the accuracy of the khim sound comparison is shown by a status color (17), where green means correct, red means incorrect, and gray means waiting for a signal. The operation of the digital computer in calibrating the sound of the khim. It has a unique characteristic: the player uses the mouse to select the desired pitch on any of the three strings on the khim (16). The player must click on the appropriate position with the mouse, which is near the bridge in each row. A colored bar will appear on the three strings of the selected pitch, and text indicating the selected pitch will appear to the left or right of the red status bar (17) as a guide for the player to know when tuning the khim that the string should be plucked at the position corresponding to the area where the colored bar appears and at the desired pitch to get the correct result. In addition, the direction of the arrow (18) indicates which direction to adjust the tension of the khim strings.