Before listening to music in the car before Bluetooth, auxiliary input, USB and other options, it was a very simple proposition. In the better part of a century, the only option for car audio is between AM and FM radio. Then the portable media’s small and powerful car use appears in the form of an eight-track, nothing is the same.
The compact cassette soon took over the road, followed by the CD, and now the digital media left everything in one or the other.
But even if you fully follow the idea of listening to music from your cell phone, the question remains: is Bluetooth better than a physical auxiliary connection, or is it another way?
Where Did Auxiliary Input?
Car audio has been a long time auxiliary input, so it is likely that the technology will be disbanded outdated. In fact, the 3.5mm auxiliary jack in front of the car stereo relies on virtually no technology since the 1960s.
The auxiliary inputs in the car radio are basically just analog connections, which have been called telephone plugs, stereo plugs, headphone jacks and various other names for many years. Has used the same basic type of plug to connect everything from the phone, electric guitar and microphone to the headset as well.
The terminology of such auxiliary connections is TRS or TRRS, which represent the tip, ring, sleeve and tip, ring, ring, sleeve.
These names, in turn, refer to physical metal contacts present in a particular auxiliary input.
Most car audio systems include a TRS connection designed to facilitate the transfer of analog audio signals from your mobile phone or any other audio output to the head of your car, exactly as you might insert a set of headphones.
There are some problems with this type of audio connection, and you may encounter some audio quality problems when you configure the analogue device of a microphones into a car audio. Using a line output instead of a headset or speaker, or using a digital USB connection instead of an analog auxiliary connection, is the way to solve this problem.
However, simply plugging the headset jack of the phone or MP3 player into the auxiliary input of the car stereo, which is a good choice for many people. Since the connection is analog, the audio signal is moved from the phone to the car stereo without compression. Therefore, although the DAC in your typical smartphone may not be optimized for this type of usage, such as a good car stereo DAC, you will not even notice this difference.
Where Did Bluetooth Come From?
Although the basic technology involved in your car’s stereo-assisted input was originally designed to transmit different types of analog audio signals in the 1960s, Bluetooth was recently invented as a way to create a secure wireless local network.
The basic idea behind creating a Bluetooth is to provide faster, more wireless alternatives for RS-232 serial port connections in the personal computer world.
By the end of the 1990s, most of the serial port was replaced by USB, but Bluetooth has finally become mainstream.
While Bluetooth is used today in different ways, most people use the technology every day through their phones. Because Bluetooth allows the creation of a secure local wireless network, the technology is widely used in connecting wireless headphones to mobile phones.
Wireless headphones and hands-free calls are Bluetooth’s main carrier to reach our car. Because so many phones already have Bluetooth, so many people are using wireless Bluetooth headset, car manufacturers began to provide built-in Bluetooth hands-free calling.
Since Bluetooth also includes a profile for streaming audio, the car audio manufacturer will also begin offering this option. Using the correct Bluetooth car stereo, you can stream audio, video, and even control a variety of radio applications directly from your phone.
Bluetooth and Auxiliary: Search For High-fidelity Audio In Your Car
In the car listening to music whether the Bluetooth is better than the auxiliary problem comes down to two main problems: audio quality and convenience. From the convenience point of view, through the auxiliary connection to the phone linked to the car stereo is very easy. In some cases, what you need to do is insert the cable and you are good. On the outside, you may need to manually select the correct auxiliary input.
Bluetooth, on the other hand, can be more superb set. In order to connect your phone or other type of MP3 player to car stereo, you must set one to “discoverable” and then use the other to find the first one. If the device is not paired, you may have to repeat the process to use it. Once your phone and car stereo are found, you usually have to enter a short password to match the two devices successfully.
The main advantage of Bluetooth in terms of convenience is that you do not have to repeat the pairing process except for unforeseen circumstances. When your phone enters your car stereo system, and both are energized, both should be automatically paired. This is more convenient than the actual insertion of the auxiliary connection.
The main drawback of using Bluetooth to listen to music is sound quality. Although it may be more convenient in the long run, but through Bluetooth, audio quality is usually worse than using auxiliary connections.
Bluetooth audio is usually not a good reason because the device uses the technology to transfer audio. Instead, to transmit uncompressed analog signals, such as physical-assisted connections, send audio over a wireless Bluetooth connection, including compressing audio at one end and then decompressing it at the other end.
Because Bluetooth audio transmission involves a lossy form of compression, so when you use this type of connection, a certain degree of audio fidelity will be lost. Can be in the form of a complete file through the Bluetooth transmission of data, without losing anything, but in this use the scene does not really play a role.
If you are not sure what these mean, and you use a Bluetooth headset or headset at home, try connecting it to your computer. If your device can choose to connect an audio Bluetooth profile or a phone Bluetooth profile, try and see the difference between the night and date.
When you choose to use a Bluetooth headset or headset on your computer with a Headset Profile, the audio that is transferred to your device is encoded at 64 kbit / s or PCM, and the configuration file also allows for minimal control, such as answering calls and adjusting the volume.
When you choose to use a Bluetooth headset or headset on your computer with the Advanced Audio Distribution Profile, although the configuration file also supports MP3, AAC, and other features, audio can be transmitted through a low-complexity SBC codec.
The difference in sound quality between the two profiles is very obvious, and almost anyone can immediately choose which one is poor. Although the difference between Bluetooth and auxiliary equipment is not great, but the actual situation is even if the use of A2DP configuration file, Bluetooth will lose a certain degree of audio fidelity.
Bluetooth Is Beyond the Auxiliary Hiding Advantage
Even if Bluetooth does provide you with a lower level of audio quality that you can detect, you may still want a very important reason to choose a wireless connection over a physical connection.
When you pair your phone with a Bluetooth car stereo or compatible OEM infotainment system, the main purpose may be to listen to music. However, creating this type of connection can also access the handsfree call without having to establish a separate connection or use a wireless headset.
In many cases, inserting a cell phone into a car stereo via a physical assistant connection will completely exclude the handsfree call. This is due to the fact that many phones will automatically use wired connections to handle any incoming or outgoing calls when a wired connection exists. Of course, this usually leads to a situation where you can hear people who talk to each other through a car speaker but can not hear your voice.
Using Bluetooth streaming music is the best way to avoid this type of problem because your phone and car audio are usually able to switch from the music stream profile to the communication profile during a call.
Does Aux Really Sound Better Than bluetooth?
In practice, you may not notice that the audio quality between Bluetooth and secondary audio is very different. This is mainly due to the inherent weakness of the car audio system. If you have a factory car audio system or a low-end aftermarket system, you may be unlikely to notice that there may be a discrepancy if you have a high-end aftermarket system. If you are driving a vehicle that is disturbed by road noise and other external sources, you may also be less likely to notice the difference between the two.
In fact, the secondary connection will always provide higher quality audio than Bluetooth, and digital connections like USB can provide better quality in some cases. However, the difference between Bluetooth and auxiliary equipment is definitely a matter of personal preference, especially if it is worth losing in terms of audio fidelity, it is not necessary to insert a physical auxiliary cable every time you get on the train.