CN217387777U - MIDI to TRS interface converter - Google Patents

Abstract

The utility model discloses a converter of MIDI to TRS interface, including at least one TRS interface that is used for connecting the TRS interface musical instrument, the MIDI five needle interface that is used for connecting the MIDI interface musical instrument, connect the TRS interface with the central unit of MIDI five needle interface and with TRS interface connection is used for switching TRS interface type is in order to match the switching circuit of different TRS interface musical instruments. Compared with the prior art, the utility model discloses the TRS interface can switch and match multiple type TRS interface musical instrument to adapt to the use of multiple TRS interface musical instrument, facilitate for the connection of converter.

Description

MIDI to TRS interface converter

Technical Field

The utility model relates to an electronic musical instrument trade, especially a MIDI changes converter of TRS interface.

Background

MIDI is used as a digital musical instrument interface and is an interface possessed by many electronic musical instruments, because the traditional 5-pin MIDI interface has a large volume, and many musical instruments use a 3.5mm or 6.35mm TRS interface to communicate MIDI messages. The existing method for connecting the TRS interface with the TRS interface is to complete the connection by converting cables, but because the TRS line sequences of different musical instruments are different, various cables are needed to be matched for connection; meanwhile, one TRS interface cannot be connected to a plurality of instruments of the TRS interface at the same time.

The TRS interfaces are divided into 2 cores (Tip/Ring, Sleeve) and 3 cores (Tip, Ring, Sleeve), and different types of TRS interfaces used by different instrument manufacturers to communicate MIDI messages are different, which causes inconvenience in communication between instruments with many TRS interfaces and instruments with multiple TRS type interfaces, and also inconvenience in communication between instruments with different TRS type interfaces.

Therefore, how to design a MIDI to TRS interface converter, which can be adapted to various types of TRS interface instruments, is a technical problem to be solved in the industry.

SUMMERY OF THE UTILITY MODEL

To among the prior art, the unable problem that matches multiple TRS interface musical instrument and use of TRS interface, the utility model provides a MIDI changes converter of TRS interface.

The technical scheme of the utility model for, a MIDI changes converter of TRS interface is proposed, including at least one TRS interface that is used for connecting the TRS interface musical instrument, the MIDI five needle interface that is used for connecting the MIDI interface musical instrument, connect the TRS interface with the central unit of MIDI five needle interface and with the TRS interface matches the setting one by one, and is used for switching TRS interface type is with the switching circuit who matches different TRS interface musical instruments.

Further, the TRS interface includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, and a fifth connection terminal for connecting with a TRS interface musical instrument, the switching circuit includes a resistor R1, a resistor R2, and a dial switch SW1, the dial switch SW1 includes a switch S1, a switch S2, a switch S3, and a switch S4 that can independently perform switching;

one end of the resistor R1 is connected to a data signal, and the other end is connected to the first ends of the switch S2 and the switch S3, respectively, the second end of the switch S2 is connected to the fifth connection end, the second end of the switch S3 is connected to the second connection end, one end of the resistor R2 is connected to a voltage of 5V, the other end is connected to the first ends of the switch S1 and the switch S4, the second end of the switch S1 is connected to the fifth connection end, the second end of the switch S4 is connected to the second connection end, and the first connection end is grounded.

Further, the central unit includes:

a MIDI message separation module, one end of which is connected with the MIDI five-pin interface and the other end of which is respectively connected with at least one TRS interface, and is used for receiving MIDI information of a MIDI interface musical instrument and separating the MIDI information to match each TRS interface for output;

one end of the MCU processing module is respectively connected to at least one TRS interface, and the other end of the MCU processing module is connected with the MIDI five-pin interface and is used for receiving input signals of at least one TRS interface musical instrument, combining the input signals and then matching the input signals with the MIDI five-pin interface for output;

and the selection switch is used for switching the central unit to work in the MIDI message separation module or the MCU processing module.

Further, the MIDI five-pin interface comprises:

a MIDI IN interface for receiving MIDI signals input from a MIDI interface musical instrument and transmitting the MIDI signals to the MIDI message separation module;

and the MIDI OUT interface is used for receiving the combined input signal sent by the MCU processing module and transmitting the combined input signal to the MIDI interface musical instrument.

Further, the MIDI five-pin interface further comprises:

a MIDI THRU interface for receiving MIDI signals input from the MIDI IN interface and transmitting the MIDI signals to the MIDI interface musical instrument.

Furthermore, a first isolation module is arranged between each TRS interface and the central unit, a second isolation module is arranged between the MIDI five-pin interface and the central unit, the input ends of the first isolation module and the second isolation module are isolated by high-speed optical couplers, and the output ends of the first isolation module and the second isolation module are isolated by double triodes.

And the power supply module is used for receiving power supplied by an external power supply and outputting 5V voltage for the converter to work.

Further, the converter also comprises a communication indicator light arranged on the converter, and the communication indicator light is used for displaying the working state of the converter.

Further, by switching the switch S1, the switch S2, the switch S3 and the switch S4, the TRS interface can work in five modes to match the use of five TRS interface musical instruments, which are respectively:

a first mode, the switch S1 and the switch S3 are closed; a second mode, the switch S2 and the switch S4 are closed; in a third mode, the switch S3 is closed; in a fourth mode, the switch S2 is closed; in the fifth mode, the switch S2 and the switch S3 are closed.

Compared with the prior art, the utility model discloses following beneficial effect has at least:

the TRS interface of the utility model can be switched and matched with various types of TRS interfaces, can adapt to the use of various TRS interface musical instruments, and provides convenience for the connection of the converter; furthermore, the utility model discloses be provided with at least one TRS interface to through the setting of central unit, make the utility model discloses can match a plurality of TRS interface musical instruments simultaneously and use, improve the convenience of using.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

FIG. 1 is a diagram of the MIDI interface of the present invention;

fig. 2 is a schematic diagram of various types of connections of the TRS interface;

FIG. 3 is a schematic connection diagram of the switching circuit;

FIG. 4 is a schematic diagram of the operation of the present invention;

fig. 5 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Thus, a feature indicated in this specification will serve to explain one of the features of an embodiment of the invention, and not to imply that every embodiment of the invention must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.

The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and examples.

The TRS interfaces are divided into 2 cores (Tip/Ring, Sleeve) and 3 cores (Tip, Ring, Sleeve), and different types of TRS interfaces used by different instrument manufacturers to communicate MIDI messages are different, which causes inconvenience in communication between instruments with many TRS interfaces and instruments with multiple TRS type interfaces, and also inconvenience in communication between instruments with different TRS type interfaces. The utility model discloses an thinking lies in, provides a MIDI changes converter of TRS interface, and its TRS interface passes through switching circuit's setting, matches polytype TRS interface and uses to satisfy the musical instrument equipment user demand of multiple TRS type interface.

The utility model provides a MIDI changes converter of TRS interface, including at least one TRS interface that is used for connecting the TRS interface musical instrument, be used for connecting the MIDI five-needle interface of MIDI interface musical instrument, connect the central processing unit of TRS interface and MIDI five-needle interface and with the switching circuit of every TRS interface one-to-one matching setting, the utility model discloses can be through the use of switching circuit's setting in order to match different TRS interface musical instruments.

Specifically, referring to fig. 2, the conventional TRS interface is divided into 2 cores (Tip/Ring, Sleeve) and 3 cores (Tip, Ring, Sleeve), which are generally five TYPEs, each of which is TYPE-a (midi standby), and is 3 cores (Tip, Ring, Sleeve), wherein in use, the Tip is used for receiving a Data signal, the Ring is used for receiving a 5V voltage signal, and the Sleeve is used for grounding;

the TYPE-B is a 3-core (Tip, Ring, Sleeve), when in use, a Tip end is used for receiving a 5V voltage signal, a Ring end is used for receiving a Data signal, and a Sleeve end is used for grounding;

TIP ACTIVE, it is 2 cores (Tip/Ring, Sleeve), when using Tip end is used to receive Data signal, Sleeve end is used to ground;

RING ACTIVE, which is 2 cores (Tip/Ring, Sleeve), Ring end is used to receive Data signal when in use, Sleeve end is used to ground;

TIP & RING ACTIVE, which is 3-core (TIP, Ring, Sleeve), with TIP and Ring terminals for receiving Data signals and Sleeve terminal for ground when in use.

The utility model provides a TRS interface, including being used for five links of being connected with TRS interface musical instrument, be first link respectively, the second link, the third link, fourth link and fifth link, its first link is used for holding with the Sleeve of TRS interface and is connected, the second link is used for holding with the Tip of TRS interface and is connected, the fifth link is used for holding with the Ring of TRS interface and is connected, third link and fourth link empty joint, in addition, first link, second link and fifth link still are connected to the switching circuit, a signal for switching output is given first link, the signal of second link and fifth link, use with the matching different TRS interface.

Specifically, referring to fig. 3, the switching circuit includes a resistor R1, a resistor R2, and a dial switch SW1, wherein the dial switch SW1 has 4 switches capable of independently performing switching, which are a switch S1, a switch S2, a switch S3, and a switch S4;

one end of the resistor R1 is connected to a Data signal (Data signal), the other end of the resistor R1 is connected to the first ends of the switch S2 and the switch S3, the second end of the switch S2 is connected to the fifth connection end, the second end of the switch S3 is connected to the second connection end, one end of the resistor R2 is connected to 5V voltage, the other end of the resistor R2 is connected to the first ends of the switch S1 and the switch S4, the second end of the switch S1 is connected to the fifth connection end, the second end of the switch S4 is connected to the second connection end, and the first connection end is grounded. (in figure 3, the numbers 1, 2, 3, 4 and 5 respectively represent the first connection end, the second connection end, the third connection end, the fourth connection end and the fifth connection end of the TRS interface)

When the instrument is matched with a TRS interface instrument for use, a Sleeve end of the TRS interface is connected to a first connecting end of the TRS interface, a Tip end is connected to a second connecting end of the TRS interface, and a Ring end is connected to a fifth connecting end of the TRS interface, and then different types of TRS interfaces can be matched for use by adjusting a dial switch SW 1.

Specifically, by adjusting the states of the switch S1, the switch S2, the switch S3 and the switch S4, the TRS interface can operate in five modes to match the use of five TRS interface instruments, wherein when the switch S1 and the switch S3 are closed, the TRS interface is in the first mode, and at this time, the first connection end of the TRS interface is grounded, the second connection end receives a Data signal, and the fifth connection end receives a 5V voltage signal, and since the first connection end is connected to the Sleeve end of the TRS interface, the second connection end is connected to the Tip end of the TRS interface, and the fifth connection end is connected to the Ring end of the TRS interface, that is, in the first mode, the TRS interface can match the TYPE-a (midi standard) of 3 cores (Tip, Ring, Sleeve);

when the switch S2 and the switch S4 are closed, the TRS interface is in the second mode, where the first connection end of the TRS interface is grounded, the second connection end receives a 5V voltage signal, and the fifth connection end receives a Data signal, and since the first connection end is connected to the sleep end of the TRS interface, the second connection end is connected to the Tip end of the TRS interface, and the fifth connection end is connected to the Ring end of the TRS interface, the TRS interface can be used in match with TYPE-B of 3 cores (Tip, Ring, sleep);

when the switch S3 is closed, the TRS interface is in a third mode, at this time, the first connection end of the TRS interface is grounded, the second connection end receives a Data signal, and the fifth connection end is not connected to the circuit, because the fifth connection end is not connected to the circuit, the TRS interface is used in matching with a 2-core (Tip/Ring, Sleeve), and because the first connection end is used for being connected with the Sleeve end of the TRS interface and the second connection end is used for being connected with the Tip end of the TRS interface, that is, in the third mode, the MIDI five-pin interface can be used in matching with TIP ACTIVE of the 2-core (Tip/Ring, Sleeve);

when the switch S2 is closed, the TRS interface is in a fourth mode, at this time, the first connection end of the TRS interface is grounded, the fifth connection end receives a Data signal, and the second connection end is not connected to the circuit, because the second connection end is not connected to the circuit, the TRS interface is used in matching with a 2-core (Tip/Ring, Sleeve), and because the first connection end is used for being connected with the Sleeve end of the TRS interface and the fifth connection end is used for being connected with the Ring end of the TRS interface, that is, in the fourth mode, the MIDI five-pin interface can be used in matching with RING ACTIVE of the 2-core (Tip/Ring, Sleeve);

when the switch S2 and the switch S3 are closed, the TRS interface is in a fifth mode, at this time, the first connection end of the TRS interface is grounded, the second connection end receives a Data signal, and the fifth connection end receives a Data signal, because the first connection end is connected to the Sleeve end of the TRS interface, the second connection end is connected to the Tip end of the TRS interface, and the fifth connection end is connected to the Ring end of the TRS interface, that is, in the fifth mode, the TRS interface can be used in match with Tip & RING ACTIVE of 3 cores (Tip, Ring, Sleeve);

that is the utility model discloses in through the setting of switching circuit, can make the utility model discloses a TRS interface can match the TRS interface of 5 different grade types at least and use, has improved greatly the utility model discloses a commonality.

Wherein, the utility model discloses be equipped with at least one TRS interface, can match at least one TRS interface musical instrument simultaneously and use, please see fig. 4, in the utility model discloses a preferred embodiment, the TRS interface is provided with 5, is TRS1, TRS2, TRS3, TRS4, TRS5 respectively, for the use of matching 5 TRS interfaces, the utility model provides a central unit is including MIDI message separation module, MCU processing module and select switch.

One end of the MIDI message separation module is connected with the MIDI five-pin interface, and the other end of the MIDI message separation module is respectively connected with at least one TRS interface and used for receiving MIDI information of a MIDI interface musical instrument and separating the MIDI information to match each TRS interface for output;

one end of the MCU processing module is respectively connected to at least one TRS interface, and the other end of the MCU processing module is connected with the MIDI five-pin interface and is used for receiving input signals of at least one TRS interface musical instrument, combining the input signals and then matching the combined input signals with the MIDI five-pin interface for output;

the switch is used for switching the central unit to work in the MIDI message separation module or the MCU processing module, and specifically, when the central unit works in the MIDI message separation module, the converter is used for transmitting the MIDI data to the TRS interface and performing musical instrument communication through the TRS interface; when the central unit works in the MCU processing module, the converter is used for receiving the data transmitted by the TRS interface musical instrument and communicating with the MIDI musical instrument through the MIDI five-pin interface.

The utility model discloses a MIDI message separation module, MCU processing module, change over switch's use makes the utility model discloses a plurality of TRS interface musical instruments of adaptation use simultaneously to data's receipt and sending have improved greatly the utility model discloses a convenience.

Further, referring to fig. 4, the MIDI five pin interface includes a MIDI IN interface and a MIDI OUT interface, wherein the MIDI IN interface is used for receiving MIDI signals input by the MIDI interface musical instrument and transmitting the MIDI signals to the MIDI message separation module. The MIDI IN interface is matched with the MIDI message separation module and the TRS interface for use, and the data transmission of one MIDI interface musical instrument to a plurality of TRS interface musical instruments can be realized.

The MIDI OUT interface is used for receiving the combined input signal sent by the MCU processing module and transmitting the combined input signal to the MIDI interface musical instrument. A MIDI OUT interface is matched with the MCU processing module and the TRS interface for use, and data transmission of a plurality of TRS interface musical instruments to one MIDI interface musical instrument can be realized.

IN addition, the utility model provides a MIDI five-pin interface still includes MIDI THRU interface, and it is used for receiving the MIDI signal of MIDI IN interface input to give MIDI interface musical instrument with MIDI signal transmission. Through the cooperation of MIDI THRU interface and MIDI IN interface, can realize the data transmission between two MIDI interface musical instruments.

Please refer to fig. 1, which is a line sequence diagram of the MIDI five-pin interface, wherein the second terminal is grounded, the fourth terminal is connected to 5V voltage, and the fifth terminal is connected to data signal.

Further, referring to fig. 4, a first isolation module (in fig. 4, isolation module 1, isolation module 2, isolation module 3, isolation module 4, and isolation module 5 are all first isolation modules) is further disposed between each TRS interface and the central unit, a second isolation module (in fig. 4, isolation module 6) is further disposed between the MIDI five-pin interface and the central unit, and input ends of the first isolation module and the second isolation module are both isolated by high-speed optocouplers, and output ends of the first isolation module and the second isolation module are isolated by dual triodes. Through the design of first isolation module and second isolation module, both can protect the musical instrument interface, avoid causing the problem of damage because of high current or high voltage, can guarantee the quick transmission of MIDI information again, improved greatly the utility model discloses a security.

Further, the utility model discloses still including the power module who is used for receiving the external power supply, it can be converted into the voltage of matching each module work of converter 5V voltage with the voltage (the input voltage scope is 5~ 12V) of external power supply input. The power supply module can be a common DC/DC module, can be used for converting DC to DC voltage, and can output voltage matched with the operation of each module of the converter so as to maintain the use of the converter.

Furthermore, a communication indicator light is arranged on the converter and used for displaying the working state of the converter, the converter is in a normally-on state after power is supplied, the converter flickers when receiving MIDI information, and the faster the communication frequency of the MIDI information is, the faster the flickering speed is.

Please refer to fig. 5, which is a schematic structural diagram of the present invention, a MIDI THRU interface, a MIDI IN interface, a MIDI OUT interface, and 5 TRS interfaces (a TRS1 interface, a TRS2 interface, a TRS3 interface, a TRS4 interface, a TRS5 interface, respectively) are all disposed on the same casing, and a DC IN interface is further disposed on the casing, which is connected to the power module, for receiving external DC 5-12V power supply, and converting the power supply into a voltage capable of working for supplying power, and a power indicator (PWR/MIDI) is disposed on the casing for displaying a working status of the converter. Every TRS kneck all is equipped with a dial switch, and it comprises 4 bit switches, corresponds the utility model discloses well change over switch' S switch S1, switch S2, switch S3, switch S4 through the switch switching mode of difference, can match different TRS interfaces and use.

The utility model discloses three kinds of connected modes have at least, do respectively:

1. the MIDI IN interface is connected with the MIDI interface musical instrument, at least one TRS interface is connected with the TRS interface musical instrument, and the converter receives MIDI signals of the external MIDI interface musical instrument and respectively sends the MIDI signals to the at least one TRS interface musical instrument after separation;

2. the MIDI OUT interface is connected with a MIDI interface musical instrument, at least one TRS interface is connected with a TRS interface musical instrument, and the converter receives input signals of the at least one TRS interface musical instrument, combines the input signals and sends the combined input signals to the MIDI interface musical instrument;

3. the MIDI IN interface and MIDI THRU interface are connected to two MIDI interface instruments, respectively, for enabling transmission of MIDI signals between the two MIDI interface instruments.

Above can find out, compare with prior art, the utility model discloses not only can match the TRS interface musical instrument of different grade type and use, can also accomplish the signal transmission of a plurality of TRS interface musical instruments and MIDI interface musical instrument simultaneously and the signal transmission between two MIDI interface musical instruments, improved greatly the utility model discloses a convenience to and the commonality that is suitable for various occasions.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (9)

1. A MIDI-to-TRS interface converter comprises at least one TRS interface used for connecting with a TRS interface musical instrument, a MIDI five-pin interface used for connecting with a MIDI interface musical instrument, a central unit used for connecting the TRS interface and the MIDI five-pin interface, and a switching circuit which is matched with the TRS interface one by one and used for switching the type of the TRS interface to match with different TRS interface musical instruments.

2. The converter according to claim 1, wherein the TRS interface includes a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, and a fifth connection terminal for connecting with a TRS interface musical instrument, the switching circuit includes a resistor R1, a resistor R2, and a dial switch SW1, the dial switch SW1 includes a switch S1, a switch S2, a switch S3, and a switch S4, which are independently switchable;

one end of the resistor R1 is connected to a data signal, and the other end is connected to the first ends of the switch S2 and the switch S3, respectively, the second end of the switch S2 is connected to the fifth connection end, the second end of the switch S3 is connected to the second connection end, one end of the resistor R2 is connected to a voltage of 5V, the other end is connected to the first ends of the switch S1 and the switch S4, the second end of the switch S1 is connected to the fifth connection end, the second end of the switch S4 is connected to the second connection end, and the first connection end is grounded.

3. The converter according to claim 1, characterized in that said central unit comprises:

a MIDI message separation module, one end of which is connected with the MIDI five-pin interface and the other end of which is respectively connected with at least one TRS interface, and is used for receiving MIDI information of a MIDI interface musical instrument and separating the MIDI information to match each TRS interface for output;

one end of the MCU processing module is respectively connected to at least one TRS interface, and the other end of the MCU processing module is connected with the MIDI five-pin interface and used for receiving input signals of at least one TRS interface musical instrument, combining the input signals and then matching the MIDI five-pin interface for output;

and the selection switch is used for switching the central unit to work in the MIDI message separation module or the MCU processing module.

4. The converter of claim 3, wherein the MIDI five pin interface comprises:

a MIDI IN interface for receiving MIDI signals input from a MIDI interface musical instrument and transmitting the MIDI signals to the MIDI message separation module;

and the MIDI OUT interface is used for receiving the combined input signal sent by the MCU processing module and transmitting the combined input signal to the MIDI interface musical instrument.

5. The converter of claim 4, wherein the MIDI five pin interface further comprises:

a MIDI THRU interface for receiving MIDI signals input from the MIDI IN interface and transmitting the MIDI signals to the MIDI interface musical instrument.

6. The converter according to claim 1, wherein a first isolation module is disposed between each TRS interface and the central unit, a second isolation module is disposed between the MIDI interface and the central unit, and the input terminals of the first isolation module and the second isolation module are isolated by high-speed optical couplers and the output terminals thereof are isolated by dual triodes.

7. The converter according to claim 1, further comprising a power module configured to receive power from an external power source and output a voltage of 5V for operation of the converter.

8. The converter according to claim 1, further comprising a communication indicator light disposed on the converter for indicating an operating status of the converter.

9. The converter according to claim 2, wherein the TRS interface is operable in five modes to match the use of five TRS interface instruments by switching of the switches S1, S2, S3 and S4, respectively:

a first mode, the switch S1 and the switch S3 are closed; a second mode, the switch S2 and the switch S4 are closed; in a third mode, the switch S3 is closed; in a fourth mode, the switch S2 is closed; in the fifth mode, the switch S2 and the switch S3 are closed.

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