JP5625179B2 - Loop playback device - Google Patents

Description

  The present invention relates to an apparatus for loop-playing desired music data.

  The reset control unit obtains a count value corresponding to the length set by the length setting unit with reference to the registered content of the count value table in which the length and the count value are registered in association with each other, and obtains the count value from the LFO. When the square wave is counted down according to the rise and fall of the square wave and becomes “0”, the playback control unit resets the current address of the music data to be played back to the playback start address value, and the user plays music. There has been proposed a music data recording / playback apparatus that copes with real time even if the tempo, length, etc. are changed during data playback and prevents accumulation of tempo deviations (see, for example, Patent Document 1). When the reset control unit does not issue a reset signal, the playback control unit has a loop playback function for repeatedly playing back the music data stored in the recording buffer memory from the playback start address by the number of playback data. On the other hand, whenever a reset signal is issued from the reset control unit during loop reproduction, loop reproduction is continued while resetting the current reproduction address to the initial value.

JP 2010-113176 A (page 7-9, FIG. 1)

  Certainly, various music apparatuses having a loop playback function for repeatedly playing back music data from the loop top to the loop end have been proposed, but the pointing operator has been realized by a switch or the like. Therefore, there was a problem that the operation was lacking in novelty.

  The present invention has been made in order to solve such a conventional problem, and it is an object of the present invention to provide an apparatus capable of a loop reproduction function with a novel operation mode.

In order to achieve the above object, the present invention provides a touch pad (10) in which a touch region (11) capable of touch operation and extending from a reference point in the X direction and the Y direction is formed;
Touch position detection means (20) for detecting a touch position on a two-dimensional XY plane;
A play area calculation means (30, step S420) for obtaining a length parameter corresponding to the touch position in the Y direction and calculating the size of a play area (Play area) that is a reproduction area of music data corresponding to the obtained length. When,
A play area start address calculating means (30, step S430) for determining a parameter as a trigger value corresponding to the touch position in the X direction and calculating a start address of the play area corresponding to the determined trigger value;
Reproduction control means for performing an operation of reproducing the music data stored in the play area in a loop by incrementing the address in order from the play area start address and by the size of the play area (30, step S440) It was made to be characterized by having.

  According to the present invention, the touch position detecting means detects the touch position on the two-dimensional XY plane, and the play area calculating means obtains a parameter that is a length corresponding to the touch position in the Y direction. The size of the play area (Play area) that is the playback area of the music data corresponding to the length is calculated, and the play area start address calculating means obtains a parameter that is a trigger value corresponding to the touch position in the X direction. A start address of the play area corresponding to the obtained trigger value is calculated. Then, the playback control means increases the addresses sequentially from the play area start address, and controls to play back the music data stored in the play area by the size of the play area. As a result, the user can perform loop playback of music data in various modes according to the touch position, and can realize loop playback in a novel operation mode.

More specifically, the apparatus further includes a length shift table in which the relationship between the length and the length shift (200) is registered in advance, and the play area calculation means (30, step S420) is provided. , means for determining a value that is the loop area (loop area) in "(60 / current BPM (Beat Per Minute)) × 4 " becomes operational, means for determining Les Holdings shift with reference to the length shift table, Means for obtaining a division value obtained by dividing the obtained loop area value by a value of “2∧ Length shift: ∧ represents power” as the size of the playback area of the play area. be able to. The play area start address calculating means (30, step S430) multiplies the play area by the trigger value to obtain the start address of the play area with a simple configuration. An address can be obtained.

  According to the present invention, it is possible to achieve an apparatus capable of loop reproduction with a novel operation mode.

It is a lineblock diagram of loop reproduction device 1 of an embodiment of the present invention. It is explanatory drawing of the length shift table 200. FIG. It is explanatory drawing of the trigger table. It is a flowchart for demonstrating apparatus operation | movement. It is explanatory drawing of apparatus operation | movement. It is explanatory drawing of apparatus operation | movement by touch operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Constitution)
FIG. 1 is a configuration diagram of a loop reproduction apparatus 1 according to an embodiment of the present invention. The device 1 includes a touch pad 10 having a quadrangular touch area in plan view and a touch for detecting touch positions in the X and Y directions on a two-dimensional plane in the XY direction from the lower left origin (reference point) of the touch area. The position detection unit 20 and a control unit 30 that receives XY coordinates from the touch position detection unit 20 and performs various calculations and controls. A D / A converter 50 for converting the music data obtained by reading the music data from the memory 40 by the control unit 30 into a digital analog signal and a speaker 55 for emitting the sound data are provided. "Play" operation is possible.

  On the other hand, when the music information picked up from the microphone 56 is connected to the control unit 30 for analog / digital conversion of the music information 51 and music data is not played back by touch operation, playback is a unique head. A “recording” operation in which music data is sequentially written from an address to a predetermined address is also possible.

 The ROM 60 stores a length shift table 200 in addition to a control program and control data (not shown). The length shift table 200 is a table in which a beat number and a length shift parameter are associated with each other and registered. A length shift value is defined for each length value. Note that the length “1” is “quarter note”. For example, the length shift for the length “1” is “2”. It should be noted that the relationship between the phrase length (seconds) of loop playback and the length and tempo is “phrase length (seconds) =“ (60 (seconds) / tempo (BPM)) × length ”.

  A trigger table 300 is developed in the RAM 70. The trigger table 300 changes as the length changes. FIG. 3 is an explanatory diagram of the trigger table 300. The relationship between the X coordinate of the touch position and the trigger value is associated with the number of beats. For example, when the number of beats (length) is “2”, the trigger value is “0” at the X coordinate “0 ≦ x <a”, and the trigger value is “X” at “a ≦ x”. The value is “1”. Thereby, a parameter which is a trigger value corresponding to the X coordinate of the touch position is obtained. Even if such a table is not provided, the trigger value is determined by a mathematical formula if the length is determined. For example, when the length is determined based on the value of the Y coordinate and the length shift value corresponding to the length value is used to divide the X axis into several regions as shown in FIG. If this value is called a “trigger determination value”, “trigger determination value” = maximum value of X axis / 2 ／ LengthShift (∧ represents a power). Here, when the X axis coordinate of the touch position is a, the trigger value i can be obtained as i = a / “trigger determination value”. When implemented by software, for example, if the initial value of i is 2∧LengthShift and the comparison evaluation expression “0 ≧ a−“ trigger determination value ”× i” is satisfied, this i value is set as a trigger value. The trigger value i can be obtained by repeating the comparative evaluation with “i = i−1”.

(Operation)
Next, the operation will be described with reference to FIGS. First, in step S <b> 400, the control unit 30 determines whether or not a user touch operation has been performed on the touch area 11 of the touch pad 10. If it is determined that there is no touch operation (No), the process proceeds to step S410 to perform recording control. In this recording control, the music data from the microphone 56 is written in a loop from an independent head address different from the loop playback to a predetermined final address in order. Thus, new music can be enjoyed sequentially by reproduction by touch operation.

When the control unit 30 determines that the user's touch operation has been performed on the touch area 11 of the touch pad 10 (Yes), the process proceeds to step 420. The control unit 30 obtains parameters such as length and trigger based on the XY coordinates with respect to the touch position, and performs calculations based on the parameters. First, the size of the “loop area” shown in FIG. 5 is obtained by the expression “(60 / current BPM) × 4”, and then the size of the play area (Play area) is calculated as “loop area / (2∧ length). Shift) ”(∧ represents a power of 2). Since the control unit 30 sequentially grasps the current BPM (Beat Per Minutes), the size of the loop area changes according to the current BPM.

  For example, when the length obtained from the Y coordinate of the touch position is “1”, the corresponding length shift is “2” from the length table 200 of FIG. 2, so that the square of 2 is the size of the “Loop area”. The size of the quarter is the size of the play area. As shown in FIG. 5, a quarter of the “loop area” is the size of the play area, that is, the loop reproduction area of the music data.

  Next, in step 430, the control unit 30 obtains a play area start address (Play area Top address), which is the start address of the Play area. At this time, since the length (number of beats) is determined, the control unit 30 refers to the trigger table 300 to obtain a trigger value corresponding to the value of the X coordinate of the touch position. Then, the play area start address is obtained by the expression “play area start address (Play area Top address) = PLAY area × trigger value (Trigger value)”. Therefore, in step S440, if “Play area start address (Play area Top address)” is used as a read start address and the music data in the Play area is repeatedly read while sequentially incrementing the address (Read address), it corresponds to the touch position. Music data is played repeatedly.

  In FIG. 5, the start address of the loop area is “loop area Top address”, and “Play area Top address” is “loop area Top address” when “loop area Top address” is set to “0”. In FIG. 5, the playback start position in the play area is “loop area Top address + Play area Top address”. In FIG. 5, “Loop buffer” means a loop area formed in the memory 40.

  Next, the operation of this apparatus will be described with reference to FIG. In FIG. 6, the horizontal axis represents the trigger, and the vertical axis represents the number of beats. This FIG. 6 is not what is actually displayed in the touch area 11, but is a conceptual explanatory diagram of the device operation. Now, when a touch operation is performed on any position in a rectangular area (“2” is displayed) surrounded by a thick frame, the X and Y coordinates of the touch position can be obtained from the touch position detection unit 20. . Then, the control unit 30 grasps that the trigger value corresponding to the X direction of the touch position is “2” and the length value corresponding to the Y direction is “1”. Note that the trigger value is “2” and the length value is “1” regardless of which position of the rectangular area in the thick frame shown in FIG. 2 is touched in the XY direction. In each other rectangular area, the touch positions in the X direction and the Y direction, which are defined as the same trigger value and the same beat number, have a width.

  Since the length shift corresponding to the length value “1” is “2” from FIG. 3, the size of the Play area is “Loop area / 4”, that is, a quarter of the loop area. FIG. 6B shows that a quarter of the size of the Loop area is the size of the Play area to be played back. On the other hand, since the trigger value is “2”, the Play area Top address is “Play area × 2”. Accordingly, there are two Play areas, and as shown in FIG. 6B, data for one Play area is sequentially read from the third initial address of the Play area and loop reproduction is performed.

  In this way, without using the two-dimensional XY coordinates of the touch position as they are to determine the playback area, the trigger value and length as parameters are obtained from the XY coordinates of the touch position, and the playback area and playback are obtained using this. Since the start address is determined, there is an advantage that the development of a new song that does not exist in the original song can be created by extracting the inflection of the song along the tempo and reproducing the arbitrary position.

  As described above, the playback apparatus according to the present invention can be used in the music field.

DESCRIPTION OF SYMBOLS 1 Loop reproducing | regenerating apparatus 10 Touchpad 20 Touch position detection part 30 Control part 40 Memory 50 D / A converter 51 A / D converter 55 Speaker 56 Microphone 60 ROM
70 RAM
200 length shift table 300 trigger table

Claims (4)

A touch pad capable of touch operation and formed with a touch area extending from a reference point in the X direction and the Y direction;
Touch position detecting means for detecting a touch position on a two-dimensional XY plane;
A play area computing means for obtaining a length parameter corresponding to the touch position in the Y direction and calculating a size of a play area (Play area) that is a reproduction area of music data corresponding to the obtained length;
A play area start address calculating means for calculating a parameter as a trigger value corresponding to the touch position in the X direction and calculating a start address of the play area corresponding to the determined trigger value;
Playback control means for performing an operation of increasing the address in order from the start address of the play area and playing back the music data stored in the play area by the size of the play area. A loop reproducing apparatus characterized by the above. The apparatus of claim 1.
Further comprising a length shift table in which the relationship between the length and the length shift is registered in advance,
The play area calculation means
Means for obtaining a value of a loop area by a calculation of “(60 / current BPM (Beat Per Minute)) × 4”;
Means for obtaining a length shift with reference to the length shift table;
Means for obtaining a division value obtained by dividing the obtained loop area value by a value of “2∧ Length shift: ∧ represents power” as the size of the playback area of the play area. A loop reproducing apparatus characterized by that. The apparatus of claim 2.
Play area start address calculation means,
A loop reproduction device characterized in that the start address of the play area is obtained by multiplying the size of the play area by the trigger value. The device according to any one of claims 1, 2 and 3,
A recording control means is further provided for performing a music data writing operation from a certain address other than the start address of the play area to a predetermined address while the touch operation is not performed on the touch area. Loop playback device.

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