TWM590301U - Revolution-beat ratio control system for turntable - Google Patents

Abstract

A turntable lap ratio control system includes a turntable, a processing module and an operation module. The turntable is used to drive a disc to rotate and read to generate a music signal. The processing module is used to analyze the music signal to generate a music speed signal, and calculate a turntable speed modulation ratio and a music speed modulation ratio according to the music speed signal and a lap ratio setting parameter, thereby generating a turntable speed control The signal and a music speed modulation signal enable the drive unit to control the rotation of the turntable according to the turntable speed of the turntable, and the frequency converter performs frequency conversion processing on the music signal according to the music speed modulation signal to generate a modulation music signal. The operation module is used to set the lap ratio setting parameters.

Description

Turntable lap ratio control system

This creation is about a turntable lap ratio control system, especially a turntable lap ratio control system that adjusts the turntable rotation speed or music speed according to the self-set lap ratio.

Please refer to the first figure, which shows a schematic plan view of the prior art turntable control system. As shown in the figure, a turntable control system PA100 includes a turntable player PA1, a turntable player PA2, a mixer PA3 and a speaker PA4.

The turntables PA1 and PA2 are electrically connected to the mixer PA3, respectively, and the mixer PA3 is further electrically connected to the speaker PA4, so that the audio transmitted from the turntables PA1 and PA2 is mixed and output to the speaker PA4 for playback. Among them, the turntable PA1 has a turntable PA11, a rotation speed switching unit PA12 and a rotation speed fine adjustment unit PA13. The turntable PA11 is used to carry a first disc PAD1, and the rotation speed switching unit PA12 and the rotation speed fine adjustment unit PA13 are used to The speed of the turntable PA11 is controlled. The speed switching unit PA12 is used to switch the specified speed, and the speed fine adjustment unit PA13 is used to finely adjust the speed. Similarly, the turntable PA2 also has a turntable PA21, a rotation speed switching unit PA22, and a rotation speed fine adjustment unit PA23. The turntable PA21 is used to carry a second disc PAD2, and the rotation speed switch unit PA22 and the rotation speed fine adjustment unit PA23 are used Come Control the speed of the turntable PA21.

Based on the above-mentioned turntable control system PA100, generally speaking, DJ (Disc Jockey) usually changes the mixed audio of the first disc PAD1 and the second disc PAD2 through the operation of the turntables PA1 and PA2, and then manufactures Produce unique music different from the original song. However, in practice, since the music speeds of the music contained in the first disc PAD1 and the second disc PAD2 tend to be different, the DJ usually needs to confirm the turntable PA11 and the repetitive operation before performing the mixing performance. The comparison relationship of the rotation speed of the turntable PA21, that is, the comparison relationship of the number of beats of one turn of the turntable PA11 and the turntable PA21.

rpm(revolutions per minute,rpm)與45rpm，意即轉盤PA11與PA21可以達到每分鐘轉33

圈與45圈。甚至有其他機種可以提供78rpm之選項。 In more detail, the existing turntables PA1 and PA2 can control the rotation speeds of the turntables PA11 and PA21 through the rotation speed switching units PA12 and PA22 and the rotation speed fine adjustment units PA13 and PA23, respectively. The common speed options for the designated speed switching units PA12 and PA22 are 33

rpm (revolutions per minute, rpm) and 45rpm, which means that the turntables PA11 and PA21 can reach 33 revolutions per minute

Circle and 45 circles. There are even other models that can provide 78rpm options.

Please continue to refer to the second diagram, which shows a schematic plan view of the different beats of each turn corresponding to the turntable of the turntable control system of the prior art. As shown in the figure, although the existing turntables PA1 and PA2 can control the rotation speeds of the turntables PA11 and PA21 through the rotation speed switching units PA12, PA22 and the rotation speed fine-tuning units PA13 and PA23, the speed of each music is different, so it corresponds to The number of beats will also be different.

Table 1 is the number of beats included in one revolution of the music speed at different speeds;

rpm或45rpm之轉速下的拍子數目變化。 As shown in Table 1, the number of beats of the first disc PAD1 or the second disc PAD2 carried by the existing turntables PA1 and PA2 is based on each music speed at 33

The number of beats changes at rpm or 45rpm.

rpm之轉速下，且第一碟片的音樂速度為100bpm(beats per minute,bpm)時，第一碟片PAD1每圈的拍子數為3拍(100bpm/33

rpm=3b/r)，即每拍之角度範圍B1為120°；然而，當轉盤PA21在33

rpm之轉速下，且第二碟片PAD2之音樂速度為133

bpm時，第二碟片PAD2每圈的拍子數約為4拍(133

bpm/33

rpm≒4b/r)，即每拍之角度範圍B2為90°。 For example, when the turntable PA11 is at 33

At rpm, and the music speed of the first disc is 100bpm (beats per minute, bpm), the number of beats per lap of the first disc PAD1 is 3 beats (100bpm/33

rpm=3b/r), that is, the angle range B1 of each shot is 120°; however, when the turntable PA21 is at 33

rpm, and the music speed of the second disc PAD2 is 133

At bpm, the number of beats per lap of the second disc PAD2 is about 4 beats (133

bpm/33

rpm≒4b/r), that is, the angle range B2 per shot is 90°.

rpm之轉速下，且音樂速度為100bpm時，亦即第一碟片PAD1每轉一圈所包含的拍子數為3拍。此DJ可以降低轉盤PA21的轉速，直到第二碟片PAD2的音樂速度從133

bpm降低到100bpm。此時雖然在轉盤PA11和轉盤PA21上讀取到的音樂都一樣是100bpm，使得DJ已經可以在兩首歌之間做初階的混音動作；然而，由於第一碟片PAD1和第二碟片PAD2每圈的拍子數還是不相同，第一碟片PAD1維持一圈4拍，而第二碟片PAD2維持一圈3拍。在此狀況下， 因為第一碟片PAD1和第二碟片PAD2還是處在不對等的狀況，兩邊轉盤PA11與PA21還在旋轉的狀態，DJ還是無法快速判斷兩邊拍子的精準位置。 Taking the above as an example, if this DJ keeps the turntable PA11 at 33

At the speed of rpm, and the music speed is 100bpm, that is, the number of beats per revolution of the first disc PAD1 is 3 beats. This DJ can reduce the speed of the turntable PA21 until the music speed of the second disc PAD2 is from 133

bpm reduced to 100bpm. At this time, although the music read on the turntable PA11 and the turntable PA21 is the same 100bpm, so that the DJ can already do the first-level mixing action between the two songs; however, due to the first disc PAD1 and the second disc The number of beats per lap of the film PAD2 is still different. The first disc PAD1 maintains 4 laps per turn, while the second disc PAD2 maintains 3 laps per turn. In this situation, because the first disc PAD1 and the second disc PAD2 are still in an unequal situation, the two turntables PA11 and PA21 are still rotating, and the DJ cannot quickly determine the precise position of the beats on both sides.

In summary, the tempo of each piece of music is not necessarily the same, so every time the disc is changed, the DJ usually still needs to use the operation again to feel how many beats per lap (or the angle range of a single beat), or even When operating the turntables PA1 and PA2 at the same time, you also need to listen to the sound analysis of the first disc PAD1 and the second disc PAD2 each lap, especially the speed of most music songs, will not just fall in the table Six speeds listed. It means that in most cases, the number of beats contained in a song in one rotation of the disc is not an integer. This situation makes it difficult for DJs to improvise. When encountering unfamiliar DJ songs, mixing different songs in a short period of time becomes a challenge.

In view of the prior art, the existing turntables usually only provide a fixed speed for users to choose, or can manually fine-tune the speed with a push rod, so when different discs are placed on the turntable, users need to re Feel the number of beats corresponding to the rotation of the disc, and then manually adjust the rotation speed of the turntable; for this reason, the main purpose of this creation is to provide a turntable turn ratio control system that can adjust the rotation of the disc according to the needs of the user. The corresponding number of beats.

In order to solve the problems of the previous technology, the necessary technical means adopted is to provide a turntable lap ratio control system, which includes a turntable, a processing module and an operation module.

The turntable includes a turntable and a reading component. The turntable is used to drive a disc to rotate, and the reading component is used to read the disc to generate a playback signal.

The processing module is electrically connected to the reading component for receiving the playback signal, and includes a multimedia storage medium, a music speed analysis unit, a processing unit, a driving unit and a frequency converter. The multimedia storage medium stores a music data and sends a music signal according to the music data. The music speed analysis unit is electrically connected to the multimedia storage medium for analyzing the music signal to generate a music speed signal. The processing unit is electrically connected to the music speed analysis unit and the reading component to receive the music speed signal and the playback signal, and calculates a turntable rotation speed modulation ratio and a music speed according to the music speed signal and a lap ratio setting parameter The modulation ratio and the lap ratio setting parameters are used to set the number of single-lap beats corresponding to each turn of the turntable when the disc rotates. The music speed adjustment ratio is the reciprocal of the turntable rotation speed adjustment ratio, and the processing unit A turntable speed control signal and a music speed modulation signal are generated according to the turntable speed modulation ratio and the music speed modulation ratio, respectively.

The driving unit is electrically connected to the processing unit, and drives the turntable to rotate according to the turntable speed control signal, thereby driving the turntable to drive the disc to rotate at a modulated turntable speed according to the turntable speed control signal, so that the turntable rotates every time the disc rotates once The actual number of beats corresponding to one remains equal to the set number of single-lap beats.

The frequency converter is electrically connected to the processing unit, and converts the music signal according to the music speed modulation signal to generate and send a modulated music signal to a speaker, and the processing unit further depends on the playback signal The signal controls the frequency converter to adjust one of the modulation music signal playing time points.

Among them, when the reading component reads the disc rotating at the speed of the modulation turntable, it adjusts and changes the frequency of one of the modulation music signals to make the speaker play a modulation music according to the modulation music signal and make it play The modulation playback speed of the modulation music is similar to the preset playback speed.

In one of the subsidiary technical means derived from the above necessary technical means, the turntable further includes a turntable body, the turntable is rotatably disposed on the turntable body, the drive unit is disposed on the turntable body, and is connected to the turntable.

In one of the subsidiary technical means derived from the above necessary technical means, the turntable lap beat control system further includes an operation module electrically connected to the processing module for setting the lap beat ratio setting parameter.

In order to solve the problems of the prior art, another necessary technical means adopted is to provide a turntable lap ratio control system, which includes a device body, a control panel, a processing module and a lap ratio setting unit.

The control panel is rotatably arranged on the device body, and is operated to generate an operation signal. The processing module is electrically connected to a multimedia storage medium and a control panel for receiving a music data and an operation signal from the multimedia storage medium and the control panel, respectively. The processing module calculates a turntable operation according to a lap ratio setting parameter The modulation ratio is adjusted, and a reading position for reading music data is moved according to the operation signal and the turntable operation modulation ratio, thereby generating a real-time music playback signal. The lap ratio setting unit is electrically connected to the processing module for setting the lap ratio setting parameters.

One of the subsidiary technologies derived from the above necessary technical means In the method, the turntable lap beat further includes a rotation analog display unit than the control system, which is electrically connected to the processing module for displaying a rotation position light.

In one of the subsidiary technical means derived from the above necessary technical means, the device body is a digital turntable.

In one of the subsidiary technical means derived from the above necessary technical means, the device body is a Musical Instrument Digital Interface (MIDI) controller.

The turntable lap ratio control system of this creation uses the turntable control module to determine the speed of the turntable by setting the music speed provided by the music speed analysis module and the lap ratio provided by the operation module, so that the turntable drives the disc. When turning, the actual number of beats of each piece of music can be kept equal to the set number of single-lap beats, thereby effectively increasing the convenience of use.

The specific embodiments used in this creation will be further explained by the following embodiments and drawings.

PA100‧‧‧Turntable control system

PA1‧‧‧Turntable player

PA11‧‧‧Turntable

PA12‧‧‧Speed switching unit

PA13‧‧‧Speed fine adjustment unit

PA2‧‧‧Turntable player

PA21‧‧‧Turntable

PA22‧‧‧Speed switching unit

PA23‧‧‧Speed fine adjustment unit

PA3‧‧‧Mixer

PA4‧‧‧horn

PAD1‧‧‧The first disc

PAD2‧‧‧Second Disc

100‧‧‧Turn turn ratio control system

1‧‧‧ turntable

11‧‧‧ Turntable body

12‧‧‧Turntable

13‧‧‧Reading module

2‧‧‧Processing module

21‧‧‧Multimedia storage media

22‧‧‧ Music Speed Analysis Unit

23‧‧‧ processing unit

24‧‧‧Drive unit

25‧‧‧Inverter

3‧‧‧Operation module

31‧‧‧Speed switching unit

32‧‧‧ Lap ratio setting unit

200‧‧‧speaker

S1, S2‧‧‧ Music signal

S3‧‧‧ Music speed signal

S4‧‧‧Turntable speed control signal

S5‧‧‧Music speed modulation signal

S6‧‧‧modulated music signal

S7‧‧‧Play signal

S8‧‧‧ Lap ratio setting signal

B1, B2‧‧‧Angle range

D1‧‧‧disc

100a‧‧‧Turn turn ratio control system

1a‧‧‧First audio operation device

11a‧‧‧Body

12a‧‧‧Control panel

13a‧‧‧lap ratio setting unit

14a‧‧‧Processing module

15a‧‧‧rotation analog display unit

2a‧‧‧Second audio operation device

3a‧‧‧Mixer

S1a‧‧‧music signal

S2a‧‧‧Operation signal

S3a‧‧‧Set signal

S4a‧‧‧Real-time music playing signal

200a‧‧‧Multimedia storage media

100b‧‧‧Turn turn ratio control system

1b‧‧‧First Audio Operation Department

11b‧‧‧Control panel

12b‧‧‧rotation analog display unit

13b‧‧‧ Lap ratio setting unit

2b‧‧‧Second Audio Operation Department

3b‧‧‧Remix

The first figure is a schematic plan view showing the prior art turntable control system;

The second picture is a schematic plan view showing that each turn of the turntable corresponding to the turntable of the prior art turntable control system is different;

The third picture is a plan view showing the turn ratio control system of this turntable;

The fourth figure is a system block diagram showing the turn ratio control system of this turntable;

The fifth figure is a schematic plan view showing the turntable lap ratio control system provided by the second preferred embodiment of this creation;

The sixth figure is a system block diagram showing the turntable lap ratio control system provided by the second preferred embodiment of this creation; and

The seventh figure is a schematic plan view showing the turntable lap ratio control system provided by the third preferred embodiment of the present creation.

Please refer to the third picture to the fourth picture. The third picture is a plan schematic diagram of the turntable ratio control system of the creation. The fourth picture is a system block diagram of the turntable ratio control system of the creation. As shown in the third to fourth figures, a turntable lap ratio control system 100 includes a turntable 1, a processing module 2, and an operation module 3.

The turntable 1 includes a turntable body 11, a turntable 12, and a reading assembly 13. The turntable 12 is rotatably disposed on the turntable body 11 and used to carry a disc D1. The reading component 13 is movably fixed to the turntable body 11 for reading the disc D1 placed on the turntable 12; wherein, the disc D1 is an operation signal plate in this embodiment, and the reading component 13 After reading the disc D1, a playback signal S7 is generated.

As shown in the third and fourth figures, the processing module 2 includes a multimedia storage medium 21, a music speed analysis unit 22, a processing unit 23, a driving unit 24, and an inverter 25.

The multimedia storage medium 21 stores a music data (not shown), and the multimedia storage medium 21 sends a music data according to the music data The music signal S1 and a music signal S2. The multimedia storage medium 21 may be various storage media such as a storage disc or a temporary memory.

The music speed analysis unit 22 is electrically connected to the multimedia storage medium 21 for receiving the music signal S2 and analyzing the music speed of the music signal S2 to generate a music speed signal S3. The music speed analysis unit 22 analyzes the music information carried in the music signal S2 to generate the music speed, and sends the music speed signal S3 according to the music speed.

The processing unit 23 is electrically connected to the music speed analysis unit 22 for receiving the music speed signal S3, and calculates a turntable rotation speed modulation ratio and a music speed modulation ratio according to the music speed signal S3 and a lap ratio setting parameter The lap ratio setting parameter is used to set the number of single-lap beats corresponding to each turn of the turntable 12 driving the disc D1; the music speed modulation ratio is the reciprocal of the turntable speed adjustment ratio, and the processing unit 23 According to the turntable speed modulation ratio and the music speed modulation ratio, a turntable speed control signal S4 and a music speed modulation signal S5 are generated respectively.

The driving unit 24 is electrically connected to the processing unit 23, and drives the turntable 12 to rotate according to the turntable speed control signal S4, thereby driving the turntable 12 to drive the disc D1 at a modulated turntable speed according to the turntable speed control signal S4. Each time the disc D1 is driven to make one rotation, the corresponding actual number of beats remains equal to the set number of single-cycle beats.

The frequency converter 25 is electrically connected to the processing unit 23 and the multimedia storage medium 21 for receiving the music signal S1 and the music speed modulation signal S5, whereby the frequency converter 25 will adjust the music speed corresponding to the music speed modulation signal S5 The modulation ratio performs frequency conversion processing on the music signal S1, and then generates and transmits a modulated music signal S6 to a speaker 200. In addition, when dealing with When the unit 23 receives the playback signal S7, the processing unit 23 further controls the inverter 25 according to the playback signal S7 to adjust one playback time point of the modulated music signal S6.

rpm、45rpm與自動變速等三個按鍵選項，而圈拍比設定單元32則包含1、2、3、4與5等五個圈拍比設定參數按鍵選項，且使用者在將轉速切換單元31切換至自動變速選項後才能進一步選擇圈拍比設定單元32之圈拍比設定參數選項。 The operation module 3 includes a rotation speed switching unit 31 and a lap ratio setting unit 32. The rotation speed switching unit 31 is provided on the turntable body 11 to control the rotation speed of the turntable 12. The lap ratio setting unit 32 is used to set a lap ratio setting parameter, and sends a lap ratio setting signal S8 according to the set lap ratio setting parameters; wherein, the lap ratio setting parameter is used to set the dial 12 Each time the disc D1 is driven to make one rotation, the corresponding one sets the number of single-cycle beats; in this embodiment, the rotation speed switching unit 31 includes, for example, 33

rpm, 45rpm and automatic shifting are three button options, and the lap ratio setting unit 32 includes five lap ratio setting parameter button options of 1, 2, 3, 4 and 5, and the user is switching the speed switching unit 31 After switching to the automatic shift option, the lap ratio setting parameter option of the lap ratio setting unit 32 can be further selected.

Based on the above, when the reading component 13 reads the disc D1 rotating at the modulation turntable speed, one of the modulation frequencies of the modulation music signal S6 is subjected to the corresponding modulation, so that the speaker 200 according to the modulation music When the signal S6 plays the modulation music, the modulation playback speed of one of the modulation music is the same as the preset music playback speed.

bpm時，處理單元23會先將音樂速度之133

bpm除以預設轉盤轉速33

rpm，進而得到4b/r之預設圈拍比，然後處理單元23會再將圈拍比參數3b/r除以預設圈拍比4b/r，進而得到3/4之 音樂速度調變比例，藉此，處理單元23便能將音樂速度訊號S3所代表之音樂速度為133

bpm乘上音樂速度調變比例3/4，進而得到100bpm之音樂速度，在100bpm之音樂速度下的實際節拍數會維持等於設定單圈節拍數3b/r。 In practice, when the user sets the lap ratio parameter to 3b/r through the lap ratio setting unit 32 (the number of single lap beats for three laps per lap), and the music speed signal S3 represents the music speed of 133

At bpm, the processing unit 23 will first set the music speed to 133

bpm divided by preset turntable speed 33

rpm, and then get the preset lap ratio of 4b/r, and then the processing unit 23 will divide the lap ratio parameter 3b/r by the preset lap ratio 4b/r, and then get the music speed modulation ratio of 3/4 In this way, the processing unit 23 can set the music speed represented by the music speed signal S3 to 133

Multiply bpm by the music speed modulation ratio of 3/4, and then get the music speed of 100bpm. The actual number of beats at the music speed of 100bpm will remain equal to the set number of single-lap beats 3b/r.

bpm降為100bpm，相當於音樂的波形被拉長，因此為了補償音樂速度降低所導致的波形被拉長，處理單元23更將音樂速度調變比例3/4之倒數4/3作為轉盤轉速調變比例，然後將預設轉盤轉速33

rpm乘上轉盤轉速調變比例4/3即可得到45rpm之轉盤轉速；換句話說，當變頻器25依據音樂速度調變訊號S5將音樂訊號S1之音樂速度由133

bpm調變成100bpm之調變音樂訊號S6時，由於驅動單元24也依據轉盤轉速控制訊號S4驅動轉盤12之轉速為45rpm，因此讀取組件13讀取以調變轉盤轉速旋轉之碟片D1時，其所調變之調變音樂訊號S6的生成頻率為調變轉盤轉速45rpm乘上設定單圈節拍數3b/r後的135bpm，因此能使揚聲器200依據調變音樂訊號S6所播放之調變音樂之調變播放速度135bpm近似於預設播放速度133

bpm，便能使碟片D1之單圈節拍數維持在四拍，且能讓使用者聽到的音樂保持不變；藉此，使用者可以依據實際需求之設定單圈節拍數來設定圈拍比參數，進而使處理模組2據以調整轉盤12之轉速來使各種音樂速度之音樂都能控制設定的單圈節拍數。 As mentioned above, since the music speed of the music signals S1 and S2 is from 133

The bpm is reduced to 100 bpm, which is equivalent to the lengthening of the music waveform. Therefore, in order to compensate for the lengthening of the waveform caused by the decrease of the music speed, the processing unit 23 further uses the reciprocal 4/3 of the music speed modulation ratio as 3/4 Variable ratio, and then set the preset turntable speed 33

Multiply the rpm by the turntable speed adjustment ratio of 4/3 to get the turntable speed of 45rpm; in other words, when the frequency converter 25 adjusts the music speed of the music signal S1 according to the music speed modulation signal S5 from 133

When bpm is adjusted to the modulated music signal S6 of 100 bpm, since the driving unit 24 also drives the turntable 12 at 45 rpm according to the turntable speed control signal S4, the reading unit 13 reads the disc D1 rotating at the adjusted turntable speed, The generated frequency of the modulated music signal S6 is 135 bpm after the modulation turntable speed is 45 rpm multiplied by the set single-lap beat number 3 b/r, so the speaker 200 can make the modulated music played according to the modulated music signal S6 The modulation playback speed of 135bpm is similar to the default playback speed of 133

bpm, it can keep the number of single-lap beats of disc D1 at four beats, and the music that can be heard by the user remains unchanged; by this, the user can set the lap ratio according to the actual demand. The parameters further enable the processing module 2 to adjust the rotation speed of the turntable 12 so that the music of various music speeds can control the set number of single-lap beats.

Please refer to the fifth and sixth figures. The fifth figure shows the plane of the turn ratio control system provided by the second preferred embodiment of the creation Schematic diagram; The sixth diagram is a system block diagram of the turntable lap ratio control system provided by the second preferred embodiment of the present creation. As shown in the figure, a turn ratio control system 100a for a turntable includes a first audio operating device 1a, a second audio operating device 2a, and a mixer 3a. Taking the first audio operating device 1a as an example, the first audio operating device 1a includes a device body 11a, a control panel 12a, a lap ratio setting unit 13a, a processing module 14a, and a rotation analog display unit 15a. Among them, the device body 11a is a digital turntable. In addition, since the structure of the second audio operating device 2a is the same as the structure of the first audio operating device 1a, it will not be repeated here.

The control panel 12a is rotatably disposed on the device body 11a, and is operated to generate an operation signal S2a. Among them, the control panel 12a is rotated to generate an operation signal S2a.

The lap ratio setting unit 13a is used to set a lap ratio setting parameter, and generates a setting signal S3a according to the lap ratio setting parameter. The processing module 14a is electrically connected to a multimedia storage medium 200a, a control panel 12a, and a lap ratio setting unit 13a for receiving a music signal S1a containing music data transmitted by the multimedia storage medium 200a, and a control panel 12a. The transmitted operation signal S2a and the setting signal S3a transmitted by the lap ratio setting unit 13a.

The processing module 14a calculates a turntable operation modulation ratio according to the lap ratio setting parameters, and moves a read position of a read music data according to the operation signal S2a and the turntable operation modulation ratio, thereby generating a music instant Play signal S4a.

The rotating analog display unit 15a is electrically connected to the processing module 14a, and is used to display the simulated music speed according to the reading position of the music data The light of degrees.

The mixer 3a is electrically connected to the first audio operation device 1a and the second audio operation device 2a, and is used to receive the real-time music playback signal S4a transmitted by the processing module 14a of the first audio operation device 1a and receive the second The music instant playback signal (not shown in the figure, which is equivalent to the music instant playback signal S4a) transmitted by the audio operation device 2a, and then generates a music mixing signal through a mixing operation.

As described above, in this embodiment, since the first audio operating device 1a is a digital turntable, the control panel 12a is not actually rotated by the movement of the motor, but is sensed when the user rotates Angle to generate the operation signal S2a; by this, when the user sets the lap ratio setting parameter by the lap ratio setting unit 13a, the processing module 14a will judge according to the lap ratio setting parameter and the rotation angle of the operation signal S2a Increased beats, and then adjust the playback position of the music. For example, when the lap ratio setting parameter is four beats per lap, the user turns the control panel 12a by 90° to be one beat.

Please continue to refer to the seventh figure, which is a schematic plan view showing the turn ratio control system provided by the third preferred embodiment of the present invention. As shown in the figure, a turntable lap ratio control system 100b includes a first audio operation section 1b, a second audio operation section 2b, and a mixing section 3b. Wherein, the first audio operation part 1b, the second audio operation part 2b and the mixing part 3b correspond to the first audio operation device 1a, the second audio operation device 2a and the mixer 3a provided by the above-mentioned second preferred embodiment One-piece structure.

Taking the first audio operation section 1b as an example, the first audio operation section 1b also includes a control panel 11b, a rotation analog display unit 12b and One lap beat ratio setting unit 13b.

As mentioned above, the turntable ratio control system 100b of this embodiment is actually a Musical Instrument Digital Interface (MIDI) controller, which is similar to the structure and operating principle of a digital turntable.

In summary, the turntable lap ratio control system of this creation uses the music speed signal and lap ratio setting parameters to calculate a turntable speed modulation ratio and music speed modulation ratio, and generates turntable speed control signals and music accordingly The speed modulation signal, and then the drive unit drives the disc to rotate according to the turntable speed control signal, and the inverter converts the music signal into a modulated music signal according to the music speed modulation signal, so that the turntable drives the disc to rotate. The actual lap number of each music can be kept equal to the set lap number, and in order to offset the difference in the reading speed of the music caused by the change of the rotation speed of the turntable, this creation further adjusts the music according to the change rate of the rotation speed of the turntable The speed effectively offsets the increase or sink in pitch caused by the processing unit lengthening or shortening the music waveform, thereby maintaining that the listener does not notice the fact that the sound waveform has been modified. In this way, the user does not need to feel the number of beats corresponding to the rotation of the disc every time a music is changed as in the prior art, effectively increasing the convenience of use.

In addition, although in the embodiment of the present invention, the operation module is a physical key provided on the body of the turntable, but it is not limited to this, and the operation module may also be implemented by a software interface in a computer system.

Through the above detailed description of the preferred specific embodiments, it is hoped that the characteristics and spirit of the creation can be described more clearly, rather than limiting the scope of the creation with the preferred specific embodiments disclosed above. in contrast The purpose is to cover various changes and equivalent arrangements within the scope of the patent to be applied for in this creation.

12‧‧‧Turntable

13‧‧‧Reading module

2‧‧‧Processing module

21‧‧‧Multimedia storage media

22‧‧‧ Music Speed Analysis Unit

23‧‧‧ processing unit

24‧‧‧Drive unit

25‧‧‧Inverter

3‧‧‧Operation module

31‧‧‧Speed switching unit

32‧‧‧ Lap ratio setting unit

200‧‧‧speaker

S1, S2‧‧‧ Music signal

S3‧‧‧ Music speed signal

S4‧‧‧Turntable speed control signal

S5‧‧‧Music speed modulation signal

S6‧‧‧modulated music signal

S7‧‧‧Play signal

S8‧‧‧ Lap ratio setting signal

D1‧‧‧disc

Claims (4)

A turn ratio control system for turntables, including: A device body; A control panel is rotatably arranged on the device body, and is operated to generate an operation signal; A processing module, electrically connected to a multimedia storage medium and the control panel, for receiving a music data and the operation signal from the multimedia storage medium and the control panel, respectively, the processing module is based on a lap ratio Setting parameters to calculate a turntable operation modulation ratio, and move a reading position for reading the music data according to the operation signal and the turntable operation modulation ratio, thereby generating an instant music playback signal; and A lap ratio setting unit is electrically connected to the processing module for setting the lap ratio setting parameters. The turntable ratio control system as described in item 1 of the patent application scope further includes a rotation analog display unit, which is electrically connected to the processing module and used to display a rotation position indicator. The turntable lap ratio control system as described in item 1 of the patent application scope, wherein the device body is a digital turntable. The turntable ratio control system as described in item 1 of the patent application scope, wherein the device body is a Musical Instrument Digital Interface (MIDI) controller.

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