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197 S Union RD, Manteca, CA 95337 United States 209-665-4150
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Steering Wheel Audio Control Integration

Steering Wheel Audio ControlWhen you go shopping for a new radio for your car, one of the many questions the product specialist should ask you is whether your existing radio has steering wheel-mounted audio controls. Almost every aftermarket radio has provisions to accept a signal that will give you steering wheel audio control functions like volume, source selection, tracking and power. Here’s how it all works.

Factory Control Functionality

Steering Wheel Audio ControlThere are two common types of steering wheel control interfaces. The first is resistive; the second is data. Systems that use resistors often have two wires connected to the switches. Each switch presents a different resistance value when pressed. The factory radio sees these different resistances as different voltages and the computer in the radio responds appropriately. There are usually two wires so a multitude of switches can have well-separated resistance values to ensure functions will never overlap.

A small computer is built into the steering wheel controls switches in vehicles that use data communication for the steering wheel audio controls. This computer has inputs dedicated to each switch and its function. When you press a switch on the steering wheel, the computer sends a digital communication to the computer in the radio. Often, this communication takes place on the vehicle’s CAN data network.

Connection to Aftermarket Radios

Steering Wheel Audio ControlIn North America, almost every radio is Steering Wheel Remote Control Ready. Being “Ready” means the radio has a connection on the back to accept a serial data communication signal. The communication language used on the radio connection is not the same as that used in the vehicle. Thus, you will require an interface module to make everything work. Companies like iDatalink, Axxess and Pacific Accessory Corporation (known in the industry as PAC) all offer interfaces that can be programmed to understand and translate the information from the vehicle to something that is compatible with your radio.

Steering Wheel Audio Control Installation

Steering Wheel Audio ControlWhen your tech is installing the new radio in your vehicle, he has three tasks to complete to make the steering wheel audio controls work. First, he must wire the controls into your vehicle. In many cases, the installer will use a “harness saver” or “wire harness adapter” to connect a set of bare wires to the factory radio plug for power, illumination and speaker wire connections. This adapter usually includes the steering wheel communication wires from the vehicle.

Once the installer completes the electrical connections, the next step is to program the module to understand the commands from the vehicle. Some interfaces have software built into them to recognize commands from the vehicle automatically.

Another method of programming the interfaces uses a website that will allow the installer to select the year, make, model and trim level of the vehicle, and program the interface to recognize the correct commands.

Finally, the interface has to be programmed to send the correct commands to the new radio. Each brand of radio has a set of dedicated and unique command codes.

Additional Options

Steering Wheel Audio ControlOver the past few years, many vehicle owners have chosen to upgrade their factory radios to add Bluetooth audio streaming and hands-free calling to their vehicle. New cars have telephone control buttons on the steering wheel, but older ones don’t. Several of the interface modules have the ability to send different commands to the aftermarket radio, depending on how long you press and hold the steering wheel buttons. For example, a quick tap on the Volume Down button will, of course, turn the volume of the aftermarket radio down. You can have the button programmed so pressing and holding it for a couple of seconds to tell the radio to answer an incoming Bluetooth phone call.

The list of compatible functions varies by vehicle and the make and model of the aftermarket radio.

Custom Applications

Steering Wheel Audio ControlOne unique feature of the steering wheel control interface is that your installer could build a set of custom controls for you. Let’s say you are building a custom car, and you want to add a nice sound system. In most applications like this, the builder will install the aftermarket radio in the glovebox, under the seat or in the trunk of the vehicle. But how can you control the radio if you cannot reach the controls? Your installer could mount a set of switches in the center console and then program the switches, through an interface module to control the aftermarket radio.

Some installers and fabricators have gotten quite creative with these switch installations. A power mirror adjustment switch, for instance, serves as a great solution for volume and tracking functions.

Your Retailer is Ready to Helpf

When it is time to install a new radio in your vehicle, drop by your local mobile electronics specialist retailer. They would be happy to show you the latest in car audio source units and explain how they can integrate it into your vehicle.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Filed Under: RESOURCE LIBRARY, ARTICLES, Car Audio, Integration

What is Bluetooth?

BluetoothIf you have been around the mobile electronics industry for any amount of time, you will know that certain terms are often used incorrectly. One term that has been over-abused lately is Bluetooth. Product manufacturers, retailers and consumers have developed an expectation of what Bluetooth is, and what it does. Sadly, those expectations can lead to confusion and undesirable results. This article explains what Bluetooth is, and how it is used.

What is Bluetooth?

BluetoothBack in the dark ages, we had to connect electronic devices with wires. We also created wheels from boulders using animal bones as tools. RS-232 was a popular type of communication protocol for devices like modems, printers, scanners and cameras. Two wires would carry data between these devices and your computer. In 1994, Ericsson – a telecommunications and network equipment manufacturer in Stockholm, Sweden – introduced a wireless alternative to RS-232 called Bluetooth.

Bluetooth is a low-power, high-speed wireless communication protocol. Bluetooth operates using short-wave UHF radio waves in the frequency band of 2.4 to 2.485 GHz. Within this range of frequencies are 79 dedicated Bluetooth channels. Bluetooth uses Frequency Hopping Spread Spectrum to reduce errors and allow multiple devices to operate within the same frequency spectrum.

Bluetooth is used for short-range data communication between devices like computer and keyboards, video game controllers and consoles, and cellular phones and wireless devices. There are applications for medical applications such as monitoring heart rate, blood pressure and glucose levels. That said, many industrial applications exist between sensors in production systems and control computers.

Bluetooth Profiles

The misconception many people in the mobile electronics industry have is that Bluetooth exists to let cellular phones make calls and stream music to our radios. Bluetooth is far more involved and flexible than that.

Any talk of Bluetooth functionality is a perfect segue to introduce us to profiles. A Bluetooth profile is a set of instructions and commands that operate over a Bluetooth connection. Profiles simplify the communication between devices. In our industry, we are used to four common profiles:

PBAP – Phonebook Access Profile

HFP – Hands-free Profile

A2DP – Advanced Audio Distribution Profile

AVRCP – Audio Video Remote Control Profile

These profiles are used in varying combinations to allow you to connect your phone to your car radio so you can make phone calls and stream music. A few companies that have wanted to provide an Internet connection to their radio have used DUN to accomplish this task.

PBAP Profile

The Phone Book Access Profile allows your source unit to receive phonebook entry information, as well as manage it. Phonebook entries are transmitted and managed by the radio in vCard 2.1 or vCard .0 formats. Missed, received and dialed numbers are listed as well.

HFP Profile

The Hands-free Profile carries monaural audio between the phone and a secondary device. The profile also supports commands to answer or reject incoming calls; place a call; use memory data to place a call, terminate a call or manage phone volume level; and send phone status information, including battery, roaming status and signal strength . These functions are included in version 1.5 of the Hands-free Profile. Future versions, such as 1.7, will include support for wideband speech and the use of external audio compression and decompression codecs.

A2DP Profile

The Advanced Audio Distribution Profile operates within another profile called the Generic Audio/Video Distribution Profile (GAVDP). A2DP is responsible for allowing us to stream audio from a device such as a smartphone to a radio or powered speaker. The basic profile allows for stereo audio to be transmitted at a sampling frequency of 44.1 kHz at up to 328 kb/s. The use of a third-part codec such as aptX from Qualcomm or LDAC from Sony may further improve on bandwidth.

AVRCP Profile

Functioning alongside the GAVDP profile is the Audio Video Remote Control Profile. AVRCP is responsible for the display of song title, artist and album information, and control over playback device functions. If you can imagine a button on a DVD remote control, the AVRCP is likely to support it. Most car audio source units include functions like play, pause, fast-forward and rewind. The most recent versions of AVRCP include support for folder navigation and searching.

What Bluetooth Doesn’t Do

Although the Bluetooth Special Interest Group (SIG) works to manage the different Bluetooth communication and profile standards, there are variations in functionality between profile versions and, more importantly, between smartphone vendors. This latter fact can be a significant issue for buyers of car audio source units. The expectation that it “should work,” while not unreasonable, is not always possible. To expect a seven- or eight-year-old radio to work flawlessly with a brand-new iPhone 7 or Samsung Galaxy S8 isn’t reasonable. The hardware in the older units cannot be upgraded.

How to Buy Bluetooth

BluetoothIf you are shopping for a new source unit, take any smartphone you want to use with it to the retailer. Ask to pair your phone with the demo unit on display. Check that your entire list of phone contacts transfers as expected. Make sure you can use voice control functions if they apply to your phone. See that you can make calls easily. Finally, check that your phone reconnects reliably to the source unit by cycling power on the source a few times.

If you purchase a new radio and have it installed, only to find out it is not compatible with your smartphone, there is often nothing that can be done quickly. Some manufacturers do release updates for Bluetooth functionality, but these updates are not going to turn a Bluetooth 3.0 system into a 4.0, or add AVRCP 1.4 to a system that shipped with AVRCP 1.2. Do your research before you buy!

If you are looking for a hands-free solution to make phone calls or stream music to your audio system, drop in at your local mobile electronics specialist retailer. Bring your phone, pair the Bluetooth connection and experiment with the options.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Filed Under: ARTICLES, Bluetooth, Car Audio, RESOURCE LIBRARY

Basics of OEM Integration in Your Newer Vehicle

OEM IntegrationInstalling a mobile audio system involves much more than just hooking up some wires and driving in a few screws. Almost all vehicle manufacturers have realized that some amount of audio system tuning will dramatically improve their customers’ experience. When you decide it’s time to upgrade your factory audio system, we need to take into account any tuning that may have been done by the factory. It’s not easy, but at the same time, it’s not impossible. This article provides a brief look at what is involved in connecting a new amplifier and speakers to your factory source unit or amplifier, or as it is called, OEM integration.

It’s Not Flat

No, we aren’t talking about the Earth. One of the first steps in designing a premium audio system upgrade is to measure the electrical signal that is being sent to each of your speakers. Why? As we mentioned, more and more factory source units and amplifiers include advanced signal processing. Even some of the most basic audio systems with only four speakers have custom equalization for each speaker. Once our installers know what they are dealing with, they use that information in designing your new system.

OEM IntegrationThe signal measurement process should be done before system design. If the signal is flat (no equalization), then the system design may take a different direction from when the signal is equalized. Compensating for factory equalization requires that some kind of equalizer be installed in the new system. Either way, we have to allot time to measure the acoustical response of the new system and make appropriate adjustments.

Think of this process as though your installer were a surgeon preparing to solve a medical problem for you. The surgeon will order x-rays, scans and many tests long before you’re on the operating table. Nobody wants to start work on a project without knowing what they are dealing with. Modern car audio systems are no different.

Front and Center

OEM IntegrationAutomobile manufacturers strive to make all their customers happy – within a certain budget. This goal includes providing an enjoyable audio experience for everyone in the vehicle. Many mid- and high-level factory audio systems use a center channel to help create a listening experience that is enjoyable for both occupants of the front seats. Configured properly, a center channel can help create a realistic soundstage from both seating positions. Trust us when we say that some of the people who tune these factory audio systems have a lot of experience doing what they do.

When we want to upgrade the audio system in a vehicle with a center channel, we have to reverse-engineer how that speaker is functioning. Is it a mono signal that is the sum of the left and right signals? Is it an up-mixed signal that plays sounds that are not reproduced by the left and right speakers? It could also be a little bit of both. Your installer will have to do some tests to decide what is happening and how to deal with it.

Do We Undo or Up-do?

OEM IntegrationIf you have a vehicle with a genuine up-mixed center channel, one of the best ways to upgrade the audio system is to leave the processing alone and add better speakers, amplifiers and signal processing. With this method, we can create a sound system that sounds amazing from both the driver and passenger seats.

The basic concept is to take the left, center and right signals; recombine any frequency filtering; then send those three signals to whatever speakers you choose for each side of the vehicle and the new center channel. Often, the new system will be a three-way speaker set in the doors and maybe the A-pillars, and a two-way system in the center. We will most certainly use a digital signal processor and/or an integration processor to do the signal filtering and tuning for the new system.

How We Undo What They Do

OEM Integration
The JL Audio Fix 82 can “fix” a number of factory signal problems.

Several processors on the market can sum filtered channels together and undo factory equalization and time alignment. Some of these processors require manual adjustments and some work automatically with a custom setup track. After using one of these processors to provide a full bandwidth signal, we can then use digital signal processing to set up the new system and compensate for the vehicle acoustics. Just as the vehicle manufacturer chose to equalize the signal going to each speaker, we need to do this to maximize the performance of your new system.

What if We Don’t Undo What They Did?

Imagine a simple scenario: You have a car, perhaps a Nissan Altima. Even the base model audio system has equalization in this vehicle. Equalization is based on the speaker that is being used, location of the speaker and acoustic effects of the vehicle on the signal from that speaker relative to the listening position. If we change the speaker to one that is better, the factory equalization can – and most likely will – work against us. That nice new speaker may sound worse than the cheap factory speaker. After all, the manufacturer tried to make what was likely a low-quality speaker sound OK.

Trust Your Local OEM Integration Experts

When it comes time to upgrade the audio system in a fairly new vehicle, make sure you are working with a mobile electronics retailer that knows how to evaluate the existing audio system properly. If you are changing the source unit, then it’s no big deal. But if you are using the factory radio and/or amplifier, proper testing is crucial. Don’t be scared or discouraged. A well-trained retailer can transform any audio system into something truly amazing! Drop in and see what they can do for you.
This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Filed Under: RESOURCE LIBRARY, ARTICLES, Car Audio, Integration

Vehicle Parking Safety Systems

Parking SafetyDid you ever wish you had eyes in the back of your head? When you are backing into a parking spot, being able to know where the car behind you is would save a lot of time and nervousness. If your car doesn’t have a backup camera or parking sensors, then it’s time to visit your local mobile electronics specialists. They can add these parking safety systems to almost any vehicle on the road.

Backup Camera Options

Parking SafetyThe classic backup camera system consists of a compact camera, typically about a 1-inch cube. The image produced by a backup camera covers a wide field of vision in both the horizontal and vertical planes. The image is reversed from that of a normal camera. When the camera is installed pointing rearward, this reversed image shows objects on the right side of the vehicle on the right side of the display screen. This orientation mimics what you would see in a rear view mirror.

Most cameras are water-resistant so rain, snow, mud and dust don’t affect their performance. The wiring for these cameras is also water-resistant, usually up to the first connection unless specified otherwise. That connection should be inside the vehicle.

Most good-quality cameras use wide-aperture shutters that allow the camera to capture a lot of light, even when it’s dark out. The reverse lights of your vehicle are often more than adequate to light up everything behind you. Most of these cameras are rated down to 0.5 or 1 Lux of light sensitivity. If you need to see in the dark, then there are cameras with built-in IR light transmitters. These can be used inside closed areas, like an engine compartment of a boat or the container of a delivery van.

Parking SafetyCameras can be installed at the top of or above your license plate. Some custom camera solutions are built into replacement tailgate, hatch handles and third brake light assemblies for many trucks and SUVs.

Several companies manufacture wireless camera systems. If you have a vehicle that is difficult to run wires in, then a wireless camera system may be a viable option. Just be aware that the quality of wireless cameras systems varies a great deal. The last thing you want is for an image to be full of noise, or not present at all due to interference. Wireless systems also have a small amount of delay inherent to their design. This delay can be as little as 100 mSec for some WiF-based camera systems up to almost 300 mSec for others that use more conventional AM and FM transmission techniques. You will need to work with your retailer to choose the right camera system for your vehicle.

Monitor and Display Options

Parking SafetyThere are many options for where the camera image can be displayed. Almost all aftermarket multimedia source units have dedicated rear view camera inputs and triggers. If your vehicle has a color display from the factory, several companies manufacture interfaces that allow an aftermarket camera image to be displayed on that screen. The third option is a dedicated display screen. This display can be a stand-alone monitor that is installed on the dash or in the center console, or is built into a new rearview mirror. Rearview mirror displays are a nice, clean option because nothing stands out as having been added to the interior.

Some camera systems designed for larger vehicles offer side and front camera locations as well. The monitors included with these systems can typically show all four cameras at once in a variety of on-screen configurations. The most elaborate of these systems will stitch the images from the four cameras together to provide a bird’s-eye view of what is around the vehicle. These 360-degree systems require careful calibration to work properly. Most of these multi-camera systems include reverse and turn signal triggers to automatically change which camera is being displayed.

How a Camera System Works

Parking SafetyWhen you put your transmission in reverse, a wire connected to your reverse lights or a reverse gear signal from your transmission triggers the camera system to turn on. You don’t need to press any buttons or flick any switches – it happens instantly and automatically. The camera should be installed and aligned so you can see the ground as close to the rear of your vehicle as possible.

Parking Sensor Systems

An alternative to a camera system is a parking sensor system. Instead of a camera, these systems use several ultrasonic sensors to detect the presence of objects. These sensors emit a very high-frequency signal, then measure how long it takes for that signal to bounce off an object and return to a receiving sensor built into the same small unit. These sensors are typically installed on the rear bumper of your vehicle. When installed properly, they do a great job of detecting even small objects like the post of a sign. This method of object detection is the same as what bats use for navigation.

Parking SafetyHow a parking sensor system works varies by brand. Some systems have a small display that shows you which sensor has detected an object and how far you are from that object. Most systems use a small beeper or buzzer to alert you to the presence of an object. The system will emit a beeping sound when it detects an object. The speed of the beeps increases as you get closer to the object. The warning beeps usually switch to a solid tone once you are within 12 inches of an object.

More-elaborate parking systems also include front-mounted sensors to help when driving forward into parking spot or garage.

Passive versus Active Warning Systems

Ultimately, cameras and parking sensor systems do the same job: They let you know when you are getting close to something.

One significant benefit of a parking sensor system over a camera system is that it is completely active. You don’t have to make a conscious decision to look at a screen or display to be warned of an imminent collision – the system beeps and tells you.

This isn’t to say that one system is better than the other – they simply differ in how they work. If you were trying to back a pickup truck up to a trailer, a backup camera system would be a huge benefit, while the parking sensor system just tells you there is something behind you.

The Importance of Parking Safety Systems

Here’s a chilling fact: More than 50 children are hit each week in the U.S. by a vehicle that is backing up. Sadly, roughly two of these children succumb to their injuries each week. We aren’t trying to scare you or make you paranoid – but accidents happen all the time while backing up.

If your vehicle didn’t come with a parking safety system, then drop by your local mobile electronics specialist retailer. They would be happy to inspect your vehicle and design a parking solution that meets your needs.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Filed Under: RESOURCE LIBRARY, ARTICLES, Backup Safety

Car Starter Remote Control Options

Starter RemoteIt’s fall, and for the mobile electronics industry, the focus shifts directly to the sales and installation of remote car starters. The size of the remote start industry is inconceivably vast. Some retailers sell and install more than a thousand of these handy little gadgets in a single season! Best Car Audio wants to help you make the purchasing process easier. Here is our introduction to remote car starter remote control options.

What Does the Remote Do?

The remote control provided with your car starter allows you to start your vehicle without having to go outside or put your key in the ignition. The philosophy is that on a cold winter morning or scorching hot summer day, you can start your vehicle a few minutes before you go outside, giving the heating or cooling system a head start on making the vehicle more comfortable.

Starter Remote
Remote range is affected by a number of things

Remote controls communicate with your vehicle using radio frequency transmission. There are two different types of communication – Amplitude Modulation (AM) and Frequency Modulation (FM). The methodology of communication alone does not determine the performance of the remote regarding range, and range is a key point in choosing a remote control. Range is the distance between you and your vehicle when the remote starter will execute commands from the remote. If you are out of range and you press the Start button on your remote, nothing happens.

Typical Range Performance

Last year, we tested a few systems that claimed to offer one-mile range. We installed both systems in the same vehicle, one after the other. We parked the vehicle in the same location to test each system. Both systems offered performance that was nearly identical and worked reliably up to about 1,600 feet away – not close to a mile. We contacted some industry peers about the performance of other systems. We saw a test of another brand, rated to provide 1 mile of range and capable of starting the vehicle from as far as 1.25 miles away. As expected, the performance of your system may vary dramatically.

Why didn’t the systems we tested work as advertised? Most manufacturers advertise “maximum range.” This distance would be under ideal conditions: no buildings, no foliage, no radio frequency interference. Imagine being in the middle of a desert and everyone else turned off all their radios, cellphone systems, TV broadcasts, satellite communications and so forth. In this impossible scenario, you’d get about a mile of range.

Starter Remote
3 mile remote range is now a reality

Why did the other system exceed the manufacturer’s ratings? Maybe this manufacturer under-rated the range. Maybe there was a lack of interference in the area. The purpose of this discussion is to clarify that performance differs based on the system you choose and where you use it.

When you go shopping for remotes, you will see a few options for range. Manufacturers advertise the shortest-range remotes as working as far away as 800 feet. Next up are the 1/4-mile or about 1,300- to 1,500-foot range units. Different companies offer different intermediate range solutions, increasing to 2,500 or 3,000 feet, then to 1 mile. One manufacturer offers a remote that claims to work at up to 3 miles. That is very cool!

Remote Feature Overview

The next consideration in selecting a car remote starter revolves around the number of buttons on the remote. The product specialist at your mobile electronics retailer will advise you about what the remote starter can control for vehicle options. These options include door locks, factory alarm control, trunk/hatch release, sliding door control, rear window defroster activation and more. Once you decide which, if any, of these features will be part of your system, you can decide which remote you need.

Starter Remote
Color displays and multiple buttons add convenience.

One-button remotes are, of course, the simplest. The single button can be used to lock and unlock the vehicle, as well as activate the remote car starter. Some remotes have four or five buttons. These remotes have dedicated buttons for locking/arming, unlocking/disarming, trunk release and remote starting. Most five-button remotes include a Function key to access additional features like auxiliary outputs and vehicle information display. Multi-button remotes are required when the system includes features like trunk or hatch release. Single-button remotes can’t activate those features.

Communication Options

Separate from the range and button configuration of a remote are options for how the remote communicates with the vehicle. A one-way remote is like your TV remote – it only sends commands to the vehicle. You have no way of knowing whether the command was received or executed unless you can physically see the vehicle. A two-way remote can send commands to the vehicle and receive information back from the vehicle. Every two-way remote has some method of letting you know what is happening. This information can be presented via LEDs, on an LCD screen, with beeps and vibrations, or a combination of many of these.

Starter Remote
2-way remote with LCD display

Let’s look at a real-world example of how a two-way remote control can be beneficial. The simplest of functions is locking your car. You press the button on your remote control, and the car should lock. But what if you didn’t lock the car before you went into a shopping mall, office building or home? If you have a one-way remote, you can only hope that pressing the lock button at this longer distance will secure your vehicle. If you have a two-way remote and the vehicle is in range, the vehicle will send a confirmation to the remote to let you know it worked – that it received and executed the command. No guessing is required.

Several manufacturers offer additional vehicle information display on remotes with LCD screens. You can query the vehicle to display battery voltage or vehicle temperature.

Other Communication Options

Starter Remote
The ultimate in long-range use is with smartphone based systems.

System control options use different technologies. These include Bluetooth interfaces that allow you to control the system from an app on your phone. Smartphone interfaces use the cellular network and an app to let you manage and monitor your vehicle from anywhere in the world – as long as you have a data connection. Proximity keys that unlock the vehicle when you approach it are another option. There are also small keypads that mount to the inside of the windshield so you can type in a code to lock or unlock the vehicle.

Whatever remote control solution you pick for your remote starter, be sure to deal with a reputable retailer to install the system. You want to choose someone who will take their time to perform the installation as reliably as possible. They should be cautious and gentle with your vehicle as they disassemble it to access wiring. They must stand behind the work they do. In many cases, the quality and reliability of the installation are proportional to the price for the system. If the price seems too good to be true, you may want to do some additional research. Online reviews are a great source of information.

Enjoy your remote car starter – it really will make a big difference in the comfort of your vehicle.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Filed Under: RESOURCE LIBRARY, ARTICLES, Remote Car Starters

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