KR100325489B1 - Electronic musical instrument used in linked to computer - Google Patents

Abstract

The present invention relates to an electronic instrument for use in connection with a computer.

The electronic musical instrument includes a key input unit for inputting keys (r × c) related to the generation or adjustment of musical instrument sounds; A speaker for outputting a sound corresponding to a key input to the key input unit to the outside; A circuit unit for selecting and outputting keys input to the key input unit; And storing musical instrument sound data corresponding to the keys in row r and c, and continuously outputting test values corresponding to the musical instrument sound data values through the output port of the parallel port to which circuit the user presses. And a computer for converting the instrument sound data corresponding to the pressed key as a result of the check into an analog signal through a sound card and outputting the analog signal to the speaker.

According to the present invention, since a sound is generated using a sound card in a computer, the computer can be implemented at a low cost at the present time when a computer is popularized. The program that interprets key presses and generates sounds can be easily upgraded, allowing the user to choose a program with various functions. When not using this electronic instrument, the keyboard is removed from the parallel port and stored separately, thus taking up less space than a conventional digital piano.

Description

Electronic musical instrument used in linked to computer

The present invention relates to an electronic musical instrument, and more particularly, to an electronic musical instrument used in connection with a computer for generating a musical instrument sound by connecting a set of key input units for inputting musical instrument sounds with a parallel port of a computer.

In general, existing electronic musical instruments, such as digital pianos, generate a sound on their own by embedding a CPU or the like. Therefore, there is a problem that the price is expensive and takes up a lot of space. In addition, there is a problem that the type of sound generated because the upgrade is not limited.

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide an electronic musical instrument for use in connection with a computer that generates a musical instrument by connecting a key input unit set for inputting musical instrument to a parallel port of a computer.

1 is a block diagram of an electronic musical instrument used in connection with a computer according to a preferred embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of the circuit unit shown in FIG. 1.

FIG. 3 is a detailed circuit diagram of the 32 × 10 switch array shown in FIG. 2.

FIG. 4A is an example of a detailed circuit diagram of a column of switch portion indicated by a dotted line in FIG. 3.

FIG. 4B is another example of a detailed circuit diagram of a column of switch portion indicated by a dotted line in FIG. 3.

FIG. 5 is a detailed circuit diagram of a dotted line circled in FIG. 4.

6 is a flowchart for explaining a key check program stored in the program storage unit 48.

In order to achieve the above object,

A key input unit for inputting keys (r × c) related to generation or adjustment of musical instrument sounds; A speaker for outputting a sound corresponding to a key input to the key input unit to the outside; A circuit unit for selecting and outputting keys input to the key input unit; And storing musical instrument sound data corresponding to the keys in row r and c, and continuously outputting test values corresponding to the musical instrument sound data values through the output port of the parallel port to which circuit the user presses. An electronic musical instrument for use in connection with a computer is provided, comprising: a computer for checking and converting the instrument sound data corresponding to the pressed key as an analog signal through a sound card and outputting the same to the speaker.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an electronic musical instrument used in connection with a computer according to a preferred embodiment of the present invention.

The electronic musical instrument according to the present invention can be largely divided into a key input unit 10, a circuit unit 20, a computer 40 and a speaker 50. The circuit unit 20 and the computer 40 are connected through a parallel port 30. The parallel port 30 has an output terminal Pout and an input terminal Pin based on a computer.

The key input unit 10 is a place where a user inputs keys (r × c) for generating an instrument sound. It is generally desirable to implement similar to the appearance of the instrument, but the shape can be implemented in any number of shapes.

The circuit unit 20 selects the keys input to the key input unit 10 and outputs the keys to the input terminal Pin of the parallel port 30.

The speaker 50 outputs the musical sound corresponding to the key input to the key input unit 10 to the outside.

The computer 40 stores the instrument sound data corresponding to the keys of the row r and c in the program storage unit 48, and outputs the test values corresponding to the instrument sound data values to the output terminal Pout of the parallel port 30. It is continuously output to the circuit unit 20 through) to check which key the user pressed. Here, the program of the program storage unit 48 may manage sound source data by itself or may make a sound by using a sound source chip provided by the sound card 42. Then, as a result of the check, the instrument sound data corresponding to the pressed key (that is, the key selected by the user) is input to the input terminal Pin of the parallel port 30, and is interfaced by the I / F 44 to the CPU 46. Enter When the CPU 46 reads the program of the program storage unit 48 and reads the corresponding instrument sound data and sends it to the sound card, the sound card 42 converts it to an analog signal and outputs it to the speaker 50. Alternatively, the sound card 42 may make a sound using the MIDI output function provided by the sound card 42. In this case, information about the type of instrument, the height of the instrument, and the volume of the instrument is transmitted, and the instrument sound is provided by the sound card.

Here, the test value is a digital value that is output to the circuit unit in order to know which key is pressed by the user, which is programmed to correspond to the instrument sound corresponding to each row and column.

A key check program will be described in more detail with reference to FIG. 6.

Set r = 0 (step 602) and c = 0 (step 604).

The r and c values are output to the circuit unit 20 through the output terminal Pout of the parallel port 30.

The value selected by the circuit unit 608 is read through the pin (step 608).

The read value is interpreted to determine whether the switch in row r and column c is pressed (step 610).

When the switch corresponding to row r and column c is pressed, a corresponding sound is generated through the sound card 42 and the speaker 50 (step 612).

It is determined whether the user has terminated the program (step 614).

If not, set c = c + 1 (step 616).

It is determined whether c <10, and if yes, steps 606 and below are repeated. That is, repeat until c = 10.

Thereafter, r = r + 1 is set (step 620), and steps 604 or less are repeated until r = 32.

In other words, all the switches from the 0 row 0 column switch to the 32 row 10 column are checked to be pressed.

Here, a switch of 32 rows and 10 columns is taken as an example, but it is not necessarily an arrangement. Theoretically, the maximum multiplexer capable of implementing 8 bits is 255 x 1.

Since the program is stored in the memory on the computer, the upgrade is possible.

FIG. 2 is a detailed configuration diagram of the circuit unit shown in FIG. 1.

In FIG. 2, for example, it is assumed that the computer 40 outputs a test value of 12 bits through the output terminal Pout of the parallel port 30 to check whether the key of the i row j column of the key input unit 10 is pressed. lets do it.

The binarized decimal decoder 202 converts a 4-bit value for checking whether the i-th row is pressed among the 12-bit test values output from the computer 40 into a decimal data value so that only the j-th column is a low voltage (eg 0V), and the remaining columns output a high voltage (e.g., 5V) to the 32x10 switch array 204.

The 32 × 1 Mux 206 receives the 8-bit value of the 12-bit test value output from the computer 40 and selects the i-th row signal among the signals of the j column to the input terminal Pin of the parallel port 30. Output As a result, the 32 × 1 Mux 206 transmits a low voltage when the key input unit is pressed and a high voltage when the key is not pressed to the pin of the parallel port 30. Since the computer 40 initially stores the test bit values for each row, knowing only the value input to the pin for each switch will tell whether the switch is pressed or not. In addition, since the instrument sound data value corresponding to the test bit value is also stored, a sound corresponding to the pressed switch can be generated.

When the key of the i-th row and the j-th column is input to the key input unit 10, the 32x10 switch array 204 receives 32x1 Mux of the low voltage of the j-column output from the binarization decimal decoder 202. Forward to 206. If the key is not input, the high voltage of the remaining columns or the high voltage of the i-th row is transmitted to the 32x1 Mux 206. Here, if no key is pressed, the high voltage of Vcc is transmitted to the 32 × 1 Mux 206 through the resistor.

Therefore, the computer 40 checks which key is continuously pressed through the Pout of the parallel port 30, so that the user can confirm the switch pressed.

The volume control pedal 210 adjusts the volume of the instrument sound by pressing a pedal. That is, when the user presses the volume control pedal 210 deeply, the volume increases, and when the user presses it shallowly, the volume decreases.

The variable resistor 212 outputs a resistance value which is changed by pressing the volume control pedal 210 to the A / D converter 208.

The A / D converter 208 converts the analog voltage value of the variable resistor 212 into a digital value and inputs it to the input terminal Pin of the parallel port 30.

The sustain pedal switch 214 is connected between the power supply voltage Vcc and the ground, and a value for adjusting the sound ringing and breaking by pressing the pedal is input to the input terminal Pin of the parallel port 30. Enter it. This switch can also be changed by the user in software programmatically.

When the input terminal Pin of the parallel port 30 is 5 bits, the signal selected by the 32 × 1 Mux 206 and the sustain pedal switch signal are preferably 1 bit, and are output from the A / D converter 208. The signal is preferably three bits. However, these are only examples and specific bits can be implemented in various ways.

FIG. 3 is a detailed circuit diagram of the 32 × 10 switch array shown in FIG. 2.

There are a total of 320 switches in FIG. 3, and each switch is connected to each one of the diodes shown in FIG. 4. FIG. 4 shows a detailed circuit diagram of a column of switch portion indicated by dotted lines in FIG. 3. 4a shows only one column for convenience, the total number of diodes is 32, but the total number of diodes for the entire ten columns is 320. That is, the output terminals of the 32 diodes shown in FIG. 4A are all connected to the binarized decimal decoder 202 shown in FIG. In addition, one side of each of the diodes is connected to a binarized decimal decoder 202 and the other side is connected to each switch. Thus, the diode is only connected to Vcc via a resistor when the user presses the switch. In addition, FIG. 4A may be implemented as shown in FIG. 4B. That is, in 32 diodes in the column direction (vertical), by combining two adjacent diodes into one, the total number of diodes connected to one terminal of the binarization decimal decoder 202 is reduced to 16. Specifically, in FIG. 4B, the diodes 0 and 1 are integrated into '0', 2 and 3 into '1', ..., 30 and 31 into '15', and two adjacent rows (horizontal) switches Integrate into one. The integrated switch is located at the portion indicated by the solid line when the user does not press the key input unit 10 (for example, a piano key) connected to the switch. This results in an even number (0, 2, 4, ...) line and diode connected. On the other hand, when the user presses the key input unit 10, the integrated switch is located in the portion indicated by the dotted line. This leaves the odd numbered lines (1, 3, 5, ...) and the diode connected. Therefore, when the user quickly presses the piano key, the switch moves quickly from the solid line position to the dotted line position, and when pressed slowly, the switch moves slowly. The program can also adjust the volume by measuring its travel time.

FIG. 5 is a detailed circuit diagram of a dotted line circled in FIG. 4.

In Fig. 5, Sij represents a switch in row i, column j, and when the Sij switch is pressed, the low voltage input from the binarized decimal decoder 202 is transferred to the 32x1 Mux 206. The low voltage is transferred to the pin of the parallel port by selecting the low voltage by the row select signal Sr. In FIG. 3, the signal selected from the 32 × 1 Mux 206 and input to the pin of the parallel port is indicated by Sk.

The present invention is not limited to the above-described embodiments, and of course, modifications can be made by those skilled in the art without departing from the spirit of the present invention. In the present invention, although the sustain pedal unit and the volume control pedal unit are implemented as separate pedals, they may use switches of the key input unit as necessary. In addition to selecting the pitch (degree, remy, ..) or instrument type (piano, violin, ..), the key input section can record and play performances, volume, accompaniment, etc. according to the program storage section. Do. It is also possible to install a general function pedal that allows the user to change its function via a program stored on a computer. In other words, different functions can be implemented in how each key function is made in the program.

Therefore, the scope of the claims in the present invention will not be defined within the scope of the detailed description, but will be limited to the claims below.

According to the present invention, by connecting the key input unit set for inputting the instrument sound to the parallel port of the computer to generate the instrument sound has the following effects.

First, while the conventional digital piano generates sound using its own sound generating circuit, the electronic musical instrument according to the present invention generates sound using a sound card in a computer, so that the computer can be implemented inexpensively at the present time. .

Second, it can easily upgrade programs that interpret keystrokes and generate sounds, allowing the user to choose a program with a variety of functions.

Third, when not using the electronic musical instrument by removing the keyboard from the parallel port and separately stored space takes less than the conventional digital piano.

Fourth, in particular, when connected to a portable computer, such as a laptop or laptop computer, there is an advantage that it becomes easy to carry.

Claims (5)

A key input unit for inputting keys (r × c) related to generation or adjustment of musical instrument sounds; A speaker for outputting a sound corresponding to a key input to the key input unit to the outside; A circuit unit for selecting and outputting keys input to the key input unit; And Instrument sound data corresponding to the keys in row r and c are stored, and test values corresponding to the instrument sound data values are continuously output to the circuit unit through the output port of the parallel port to check which key is pressed by the user. And a computer for converting the instrument sound data corresponding to the pressed key as a result of the check to an analog signal through a sound card and outputting the same to the speaker. The method of claim 1, And at least one of a general function pedal for changing a function of the user through a program stored in the computer, a volume adjusting pedal for adjusting the volume, and a sustain pedal for adjusting the ringing and breaking of the sound. Electronic musical instrument used in connection with a computer characterized in that. The method of claim 1, The key input unit includes at least one of a pitch control key, an instrument type selection key, a key for recording and playing a performance, a volume control key, an accompaniment key, and a general function key that can be changed through a program stored in the computer. Electronic musical instrument used in connection with a computer, characterized in that it further comprises. The apparatus of claim 1, wherein the computer outputs a 12-bit test value through an output terminal of the parallel port to check whether a key of row i and column j of the key input unit is pressed. The circuit portion Of the 12-bit test values output from the computer, a 4-bit value for checking whether the i-th row is pressed is converted into a decimal data value, so that only the j-th column is a low voltage, and the remaining columns output a high voltage. Gene detoxifiers; A switch array configured to output a low voltage of the j column output from the binarization decimal decoder when a key of an i th row and a j th column is input to the key input unit; Selection for inputting to the input terminal of the parallel port by selecting a signal of the i row among the low voltages of the j column by an 8-bit value for selecting the i-th row signal among the 12-bit test values output from the computer part; Volume control pedal for adjusting the volume of the instrument sound by pressing a pedal; A variable resistor for outputting a resistance value that is varied by pressing the volume control pedal; An A / D converter for converting an analog voltage value of the variable resistor into a digital value and inputting the same to an input terminal of the parallel port; And It is connected between the power supply voltage (Vcc) and the ground, and connected to a computer comprising a sustain pedal unit for inputting a value for adjusting the sound ringing and breaking by pressing the pedal to the input terminal of the parallel port. Electronic musical instrument used. The method of claim 4, wherein The switch array is a 32 × 10 array, the selection unit is used in connection with a computer, characterized in that the 32 × 1 multiplexer.