At present, various MP3 car access devices on the market are all rotated around the audio host. Therefore, first understand the working principle of the car audio host, the following work will be easier. At present, the majority of family cars are equipped with the same principle of car audio. Most audio mainframes have radio, tape or CD functions. A few car audio mainframes are also equipped with line input function or external changer control.
Option 1: Radio channel, convenient for MP3
Almost every audio unit has an FM radio function. Therefore, the most convenient way to install MP3 is to use a wireless transmitter module costing tens of dollars to convert the MP3 decoded audio signal into an FM radio wave signal through the headphone jack, and then adjust the radio to the corresponding "radio". Frequency, you can listen. According to the transmission frequency, the car MP3 access products have single frequency points and multiple frequency points. According to the function, there is a separate transmitter product (can be connected to MP3, PDA, MD and other portable products); there is a transmitter module integrated in the MP3 player product; also has integrated U disk MP3 player function on the car transmitter of.
In terms of sound quality, the system with stereo phase-locked loop and battery-powered products can avoid frequency drift and avoid power pollution when taking power from the car. The sound quality is relatively good. But no matter how high-end transmitter products, you can only hear the sound quality of the radio. Be sure to test after starting the engine at the time of purchase. Due to the different electromagnetic environment and radio sensitivity of different regions and different models, the same product works better on one vehicle, but may be less effective on another vehicle. If you don't want to spend too much money on this aspect and want to listen to the most popular music, this access method is the most appropriate, but the sound quality is much worse.
Option 2: Tape access, the first choice for vintage cars
The tape uses a magnetic head, which can record and play audio. During playback, the head can sense the change in the magnetic field caused by the movement of the tape and produce a sound current. During recording, the head can convert the sound current flowing through into a magnetic field change, and record the sound signal on the moving tape. The principle of the tape converter is to install a magnetic field input head in the tape to generate a changing magnetic field when the sound current passes. This change in the magnetic field induces a sound current in the playback head of the audio host. Try it when you buy it and you can use it normally.
Option 3: CD/MP3 head directly listens
For some CD heads that support MP3 discs, of course, there is no need to explain, engraved MP3 discs can be put in, such as Panasonic CQ-DP383.
Option 4: Audio input can get good sound quality
This feature is not available for every host. If there is a LINE IN or AUX IN jack on the back of the audio console, congratulations, you are happy. You only need to buy a shielded audio conversion cable for a few dollars, and input the MP3 or other portable headphones signal. If the nose does not have this function, it can also be implemented by modification, but only if a professional who understands electronic maintenance is found. Then, the machine head is disassembled and cut off in the original stereo sound receiving path, generally the input end of the sound effect adjusting chip, and then connected to a headphone jack with an on-off function to input the external sound source. When plugged in, it was a big deal, and the radio was still available when the external audio source was unplugged.
Option 5: External CD channel cleverly helps
Some heads can be connected externally to a multi-disc CD player. The easiest way to do this is to add a small CPU and a simple program to trick the host into saying that an external CD is required to come in, so that the audio is input without interference. Some hosts can even save the CPU, and a switch allows the host to open this path to input the sound. This input method is actually equivalent to the AUX access mentioned above. For example, a representative CUMP product suitable for the Volkswagen car system can simulate the communication protocol between the host and the changer, and has the U disk file management and MP3 decoding function. The user inserts a USB flash drive or a common USB storage device such as a hard disk or an MP3, and builds a plurality of file directories. The audio host can not only hear the sound without distortion, but also use the buttons and display of the original car host to control the change of the directory. The change of the song is better than the control of the button on the small MP3. It is convenient and intuitive, and it is also good for driving safety. This is also the most extreme existing car MP3 access method.
Not supporting MP3 playback is a very depressing thing. You can't get a big box full of CDs. Today we will learn a few tricks to make your car completely fall in love with MP3.
At present, various MP3 car access devices on the market are all rotated around the audio host. Therefore, first understand the working principle of the car audio host, the following work will be easier. At present, the majority of family cars are equipped with the same principle of car audio. Most audio mainframes have radio, tape or CD functions. A few car audio mainframes are also equipped with line input function or external changer control.
Option 1: Radio channel, convenient for MP3
Almost every audio unit has an FM radio function. Therefore, the most convenient way to install MP3 is to use a wireless transmitter module costing tens of dollars to convert the MP3 decoded audio signal into an FM radio wave signal through the headphone jack, and then adjust the radio to the corresponding "radio". Frequency, you can listen. According to the transmission frequency, the car MP3 access products have single frequency points and multiple frequency points. According to the function, there is a separate transmitter product (can be connected to MP3, PDA, MD and other portable products); there is a transmitter module integrated in the MP3 player product; also has integrated U disk MP3 player function on the car transmitter of.
In terms of sound quality, the system with stereo phase-locked loop and battery-powered products can avoid frequency drift and avoid power pollution when taking power from the car. The sound quality is relatively good. But no matter how high-end transmitter products, you can only hear the sound quality of the radio. Be sure to test after starting the engine at the time of purchase. Due to the different electromagnetic environment and radio sensitivity of different regions and different models, the same product works better on one vehicle, but may be less effective on another vehicle. If you don't want to spend too much money on this aspect and want to listen to the most popular music, this access method is the most appropriate, but the sound quality is much worse.
Option 2: Tape access, the first choice for vintage cars
The tape uses a magnetic head, which can record and play audio. During playback, the head can sense the change in the magnetic field caused by the movement of the tape and produce a sound current. During recording, the head can convert the sound current flowing through into a magnetic field change, and record the sound signal on the moving tape. The principle of the tape converter is to install a magnetic field input head in the tape to generate a changing magnetic field when the sound current passes. This change in the magnetic field induces a sound current in the playback head of the audio host. Try it when you buy it and you can use it normally.
Option 3: CD/MP3 head directly listens
For some CD heads that support MP3 discs, of course, there is no need to explain, engraved MP3 discs can be put in, such as Panasonic CQ-DP383.
Option 4: Audio input can get good sound quality
This feature is not available for every host. If there is a LINE IN or AUX IN jack on the back of the audio console, congratulations, you are happy. You only need to buy a shielded audio conversion cable for a few dollars, and input the MP3 or other portable headphones signal. If the nose does not have this function, it can also be implemented by modification, but only if a professional who understands electronic maintenance is found. Then, the machine head is disassembled and cut off in the original stereo sound receiving path, generally the input end of the sound effect adjusting chip, and then connected to a headphone jack with an on-off function to input the external sound source. When plugged in, it was a big deal, and the radio was still available when the external audio source was unplugged.
Option 5: External CD channel cleverly helps
Some heads can be connected externally to a multi-disc CD player. The easiest way to do this is to add a small CPU and a simple program to trick the host into saying that an external CD is required to come in, so that the audio is input without interference. Some hosts can even save the CPU, and a switch allows the host to open this path to input the sound. This input method is actually equivalent to the AUX access mentioned above. For example, a representative CUMP product suitable for the Volkswagen car system can simulate the communication protocol between the host and the changer, and has the U disk file management and MP3 decoding function. The user inserts a USB flash drive or a common USB storage device such as a hard disk or an MP3, and builds a plurality of file directories. The audio host can not only hear the sound without distortion, but also use the buttons and display of the original car host to control the change of the directory. The change of the song is better than the control of the button on the small MP3. It is convenient and intuitive, and it is also good for driving safety. This is also the most extreme existing car MP3 access method.
Not supporting MP3 playback is a very depressing thing. You can't get a big box full of CDs. Today we will learn a few tricks to make your car completely fall in love with MP3.
At present, various MP3 car access devices on the market are all rotated around the audio host. Therefore, first understand the working principle of the car audio host, the following work will be easier. At present, the majority of family cars are equipped with the same principle of car audio. Most audio mainframes have radio, tape or CD functions. A few car audio mainframes are also equipped with line input function or external changer control.
Option 1: Radio channel, convenient for MP3
Almost every audio unit has an FM radio function. Therefore, the most convenient way to install MP3 is to use a wireless transmitter module costing tens of dollars to convert the MP3 decoded audio signal into an FM radio wave signal through the headphone jack, and then adjust the radio to the corresponding "radio". Frequency, you can listen. According to the transmission frequency, the car MP3 access products have single frequency points and multiple frequency points. According to the function, there is a separate transmitter product (can be connected to MP3, PDA, MD and other portable products); there is a transmitter module integrated in the MP3 player product; also has integrated U disk MP3 player function on the car transmitter of.
In terms of sound quality, the system with stereo phase-locked loop and battery-powered products can avoid frequency drift and avoid power pollution when taking power from the car. The sound quality is relatively good. But no matter how high-end transmitter products, you can only hear the sound quality of the radio. Be sure to test after starting the engine at the time of purchase. Due to the different electromagnetic environment and radio sensitivity of different regions and different models, the same product works better on one vehicle, but may be less effective on another vehicle. If you don't want to spend too much money on this aspect and want to listen to the most popular music, this access method is the most appropriate, but the sound quality is much worse.
Option 2: Tape access, the first choice for vintage cars
The tape uses a magnetic head, which can record and play audio. During playback, the head can sense the change in the magnetic field caused by the movement of the tape and produce a sound current. During recording, the head can convert the sound current flowing through into a magnetic field change, and record the sound signal on the moving tape. The principle of the tape converter is to install a magnetic field input head in the tape to generate a changing magnetic field when the sound current passes. This change in the magnetic field induces a sound current in the playback head of the audio host. Try it when you buy it and you can use it normally.
Option 3: CD/MP3 head directly listens
For some CD heads that support MP3 discs, of course, there is no need to explain, engraved MP3 discs can be put in, such as Panasonic CQ-DP383.
Option 4: Audio input can get good sound quality
This feature is not available for every host. If there is a LINE IN or AUX IN jack on the back of the audio console, congratulations, you are happy. You only need to buy a shielded audio conversion cable for a few dollars, and input the MP3 or other portable headphones signal. If the nose does not have this function, it can also be implemented by modification, but only if a professional who understands electronic maintenance is found. Then, the machine head is disassembled and cut off in the original stereo sound receiving path, generally the input end of the sound effect adjusting chip, and then connected to a headphone jack with an on-off function to input the external sound source. When plugged in, it was a big deal, and the radio was still available when the external audio source was unplugged.
Option 5: External CD channel cleverly helps
Some heads can be connected externally to a multi-disc CD player. The easiest way to do this is to add a small CPU and a simple program to trick the host into saying that an external CD is required to come in, so that the audio is input without interference. Some hosts can even save the CPU, and a switch allows the host to open this path to input the sound. This input method is actually equivalent to the AUX access mentioned above. For example, a representative CUMP product suitable for the Volkswagen car system can simulate the communication protocol between the host and the changer, and has the U disk file management and MP3 decoding function. The user inserts a USB flash drive or a common USB storage device such as a hard disk or an MP3, and builds a plurality of file directories. The audio host can not only hear the sound without distortion, but also use the buttons and display of the original car host to control the change of the directory. The change of the song is better than the control of the button on the small MP3. It is convenient and intuitive, and it is also good for driving safety. This is also the most extreme existing car MP3 access method.
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