WO2002045072A1

WO2002045072A1 - Device for keyboard musical instruments

Info

Publication number: WO2002045072A1
Application number: PCT/CN2001/001559
Authority: WO
Inventors: Siu Cheung Mok
Original assignee: Siu Cheung Mok
Priority date: 2000-11-15
Filing date: 2001-11-14
Publication date: 2002-06-06
Also published as: CN1196099C; CN1352449A; AU2002221486A1

Abstract

A device for keyboard musical instruments includes a sound input unit, a process unit, and a display unit for displaying the keys corresponding to the input sound. The device generally has colours like as the keys when it is not working. By the tone demodulation, the closest gamut and aberration degree is calculated from the sound input. The aberration degree is displayed corresponding to the colours, brightness and blinking frequency of the display element and the close display element of the closest gamut, so that the device is felt as brightening keys. The display elements more than the keys can be used to distinguish the more fine aberration and different overtone component. This device may be separated into short pieces or connected to work as an integer device.

Description

Device for displaying musical instrument keys to be pressed Field of the invention

In summary, the present invention relates to a device that can be placed on a keyboard instrument to display performance. In particular, the present invention relates to a device for displaying in real time the keys to be pressed by a player. Background technique

U.S. patents US3722352 and US4457203 disclose different ways to illuminate the keys of an instrument being played. U.S. Patent No. 5,907,115 discloses an additional device for a conventional keyboard instrument, and some light emitting diodes (LEDs) are disposed on the device. In the above three patents, an LED corresponds to a key between the key and the display element. They are all based on the tunes stored in the memory in advance, and they all use only light-emitting display elements. Summary of invention

The present invention is based on inputting sound signals and is a device for a keyboard instrument to display a key to be pressed when playing a musical piece. Overtones for different sound inputs are also displayed.

Any deviation from the sound input from a scale to the reference music scale is displayed. It is therefore an object of the present invention to provide a device that enables people to follow the sounds or singing voices of instruments played by other performers and see the keys to be pressed by the performers. The present invention can also be used to process sound from another sounding device, so that a key to be pressed is seen.

Another object of the present invention is to provide a device placed on a keyboard musical instrument, which allows a person to see the deviation of the musical reference scale in the sound input scale.

Another object of the present invention is to provide a device placed on a keyboard instrument, which allows a person to see a plurality of sounds existing in a sound signal, and the scale and overtone components of each sound.

A different object of the present invention is to provide a tool to help learn a keyboard instrument.

It is another object of the present invention to provide a device which enables a composer to see the interplay of different musical instruments and scales.

The invention is a device for a keyboard musical instrument. It can be both part of the instrument and Therefore, additional equipment is placed separately on the keyboard surface. When used as an additional device, the positioning component fits the key shape on the device. The positioning means allows the additional device to be placed in place on the key. This additional device can be combined into a single strip that covers all keys, or it can be split into short sections. When split into sub-sections and side-by-side, they can be virtually joined together. They can communicate this and work as a unit. They can also work without communication with each other, but each is responsible for displaying different scale ranges, and essentially performs the same algorithm, so it still works like a single device.

The device contains an audio signal input section, a processing element, a display section and a memory.

The sound input part of the invention may be a sound pickup device for receiving external sound. It can also receive input from various electronic devices, such as MP3 players, compact disc [CD] players, instrument digital interface [MIDI] keyboards or electronic computers. Basically, any musical instrument or musical device that can produce sound in analog or digital form can be used. It can also read out sound data that has been stored in memory.

The input sound is passed to the processing element, which is used to calculate the frequency components that are present in the sound signal. There are many different conversion methods, which convert time-domain data to frequency-domain data, which are not explained in depth here. For example, the Fast Fourier Transform belongs to digital processing, and the filter band can be implemented with digital or analog components.

After converting from time to frequency, we can find that the frequency combination components in the frequency domain all have major peaks. The combination component is a simple multiple of harmonics (overtones), all of which are integrated one by one and are represented by the lowest frequency combination component. This is the basic frequency of the group. The different fundamental frequencies of the group are processed separately, enabling the device to display multiple sounds, which are received from the input part of the sound. The amplitudes of the combined components that together form a group symbolize the sound characteristics related to the fundamental frequency. Therefore, the display of this scale will reflect the sounds produced by different instruments and other sounds that can affect the composition of the overtones.

As for each group obtained from the fundamental frequency, it is compared with the tonal scale in use. For example, in the twelve average tones, middle C is 261.3 Hz, And every half-note (semi-note) is two-twelfths, and its value is almost 1.06. There are other tones such as Natural and Pythagoras.

The key that needs to be pressed is a scale of the frequency closest to the fundamental frequency. One or more display elements of the corresponding key are used to display the characteristics of the scale. Based on the pitch, those adjacent display elements of the relevant key element being displayed are used to indicate the degree of deviation from the reference frequency.

For example, a sound with a fundamental frequency of 262 Hz will cause those display elements in the middle C to emit light. The component emits light based on its overtone combination. One method is to use a single display element on that key, or use multiple display elements of different colors to reflect the harmonic combination of the fundamental frequency. Display elements use different colors or brightness to reflect the intensity of each overtone. In addition, like color mixing, each overtone of the fundamental frequency is represented by a different color, and the proportion of the color is based on the amplitude of the respective overtone combination component. In addition, those different overtones can be subdivided into sub-groups, so that when there is no combined component in a subgroup, the display elements corresponding to this subgroup will be completely dark. For example, suppose that the overtones are split into single and double overtones, and only a separate display element is used for the fundamental frequency, and then for a pure sine wave without overtones, only the display element of the fundamental frequency will be illuminated. . The display elements for both single and double harmonics are dark. For some instruments, if there is only a single or double multiple overtone, only the fundamental frequency display element and one of the other two display elements will light up, and the light and its color reflect the overtone combination. The tone display element adjacent to the higher scale is used to indicate a deviation of 0.7 Hz. Assuming that each key has only one display element, the adjacent higher-tone scale display element is the display element corresponding to C # (C Sharp). It can use different colors or brightness to indicate the degree of deviation. It can also be a fixed color, reflecting the degree of deviation with flashing speeds of dimming and lightening.

The display elements described above are considered to be capable of displaying different colors under the control of the processing section. It is selected from a reflective display device, or a light emitting device, or a light valve with a light source. They can have well-defined lines, such as LCD [Liquid Crystal Display], or use a diffuser for covering the blurred lines of display elements. BRIEF DESCRIPTION OF THE DRAWINGS

The above and other Θ, structure and features of the present invention will become clearer when reading this application in conjunction with the accompanying drawings. among them:

Figure 1 shows a block diagram of the device of the invention;

Figure 2 shows a perspective view of two devices of the present invention arranged in a row on a keyboard instrument; Figure 3 shows an image of the frequency components of overtones;

Fig. 4 shows a top view of the device of the invention with a key and a display element; and Fig. 5 shows a top view of the device with a key and a plurality of display elements. Example description

The device of the present invention will now be described by way of example with reference to the accompanying drawings.

Reference is first made to FIG. 1, which shows a block diagram of the device of the present invention, and number 1 indicates a sound input section. 2 indicates a processing section, 3 indicates a display element, and 4 indicates a memory. The sound input section 1 is connected to the memory 4 and to the processing section 2. The input terminal of the processing section 1 receives the sound signal from the sound input section 1, and then performs frequency component calculation, packet processing, and display calculation in sequence. The output terminal of the processing section 2 is connected to the display element 3, and the other terminal of the processing section 2 is connected to the memory 4.相连接。 Phase connection.

Figure 2 shows the device placed on the keys of a keyboard instrument. As shown in the figure, two devices 20 and 30 are placed in a row, and the coverage area is longer than that of a single device.

Figure 3 shows the main method used for this processing element. Frequency combination component was detected

(Detected), and each frequency component (overtone) near multiples of the fundamental frequency is grouped. 11 represents the first scale and its overtones, 12 represents the second scale and its overtones, and 13 represents the interaction of the first scale and the overtones of the second scale.

Fig. 4 shows a preferred embodiment of the present invention, which shows only one display element and one associated key 101. The frequency combination component is expressed as the color on the display element 302 or is displayed without color at all. The deviation of the sound input from the standard scale is expressed by the visual effect of the nearby display element 303.

FIG. 5 shows another preferred embodiment of the present invention. Each key 101 has a corresponding Display element 302. When an input sound matches the scale of this key, the display element of this key will glow. Between the display elements corresponding to those keys is an additional display element 305; it is used to display the frequency deviations represented by those keys. Another group of display elements 304 associated with each key is a combination of frequencies used to indicate multiples of the fundamental frequency.

Claims

Claim

1. A device for keyboard instruments, containing:

a) a sound input part for inputting a sound signal;

b) A processing section for calculating frequency combination components, which processes the sound signal, the closest scale of the frequency combination component, its deviation and its overtones; groups the frequency combination components, and outputs the displayed on the display element Graphics.

c) a display section, which is like a part of a key when not in use, and changes color to show the scale of the input sound and the degree of deviation from the standard scale; and

2. The device according to claim 1, characterized in that the device is part of a keyboard musical instrument.

3- The device according to claim 1, characterized in that, as an accessory, it is placed on the keyboard of the musical instrument and has a positioning member matching the shape on the keyboard of the musical instrument.

4. The device according to claim 1, characterized in that a plurality of devices are arranged in a row to cover a wider key portion.

5. The device according to claim 4, characterized in that the devices in a row can be disconnected and work independently, and generally use the same algorithm as each other to work as a unit. ·

6. The device according to claim 4, characterized in that the devices arranged in a row are actually connected together.

7- The device according to claim 4, characterized in that said list of devices can communicate with each other to work as a whole device.

8. The device according to claim 1, wherein the sound input element receives sound from the environment.

9. The device according to claim 1, wherein the sound input element receives a sound signal from another device.

10. The device according to claim 1, wherein the sound input element reads sound data stored in a memory in advance.

11. The device according to claim 1, wherein the processing section stores data of sounds in a memory.

12. The device according to claim 1, wherein the processing section, in a mode of operation, processes the input of sound, and then sets its configuration, behavior, and calculation result of the input sound according to the operation. As the operating parameters of the device.

13. The device according to claim 1, wherein the processing section is in an operation mode, processes the input sound, calculates a frequency combination component of the sound signal, and then calculates its individual display element according to the intensity of the frequency combination component. Of brightness.

14. The device according to claim 1, characterized in that said processing section is in an operation mode, and it calculates that it comprises a frequency combination component for displaying the calculated sound signal.

15. The device according to claim 13, characterized in that the frequency combination components are those simple multiples which are close to each other are aggregated into a single lowest frequency combination component, and the display of its harmonic components is suppressed.

16. The device according to claim 13, characterized in that the frequency components in the frequency components which are near multiples of the fundamental frequency are overtones of the fundamental frequency, and their intensities are used as display elements for calculating keys corresponding to the fundamental frequency colour.

17. The device according to claim 16, characterized in that the found fundamental frequency multiples are transformed into different colors, luminosities, and combined into a small number of display elements.

18. The device according to claim 1, characterized in that the processing part communicates and works with other devices to form a whole.

19. The device according to claim 1, wherein each key includes a corresponding display element.

20. The device according to claim 1, characterized in that there are other display elements between the display elements of the keys.

21. The device according to claim 1, characterized in that there is a clear boundary between the display elements.

22- The device according to claim 1, characterized in that the display portion has a display element covered by a diffuser; and is used to mix light emitted from adjacent display elements.

23. The device according to claim 1, wherein the display element is a light reflecting device.

24. The apparatus according to claim 1, wherein the display element is a light emitting device.

25. The device according to claim 1, wherein the display element is a light valve and a light source.

26. The device according to claim 1, characterized in that it is used as a standard scale display element which displays those colors which change with the loudness of the scale.

27. The device according to claim 1, wherein the standard scale deviation degree of the device is displayed by a flicker rate from the display element.

28. The device according to claim 1, wherein the standard scale deviation degree of the device is displayed by a color from the display element.

29. A keyboard musical instrument, characterized by comprising a device according to any one of the preceding claims.