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Showing posts with label Equalizing Processing and Crossing Over. Show all posts
Showing posts with label Equalizing Processing and Crossing Over. Show all posts

Tuesday, February 28, 2017

How to connect music in Hp to Car Stereo


One similarity of some people who buy hp namely the desire to put their new gadget not only for communication but also for entertainment, especially for playing music. Many are like the sophistication, that this phone can be connected to the car stereo. Tell how to connect mp3 hp to the car so that the music from the memory of telephone sounded loud through the car speakers. There are three ways to connect mobile phones to the car: skip adding audio cable, Bluetooth or FM transmitter passes.

Sorry this page may be difficult to understand for some readers, tp suda updated; How to Connect HP to Mobile

Auxiliary Audio Cable


Of the three options on how to connect to the tape hp car, the first way is the cheapest, if the car has had Aux outlet. To find out whether your car is already configured for this, find an outlet in your car stereo Aux. Outlet generally looked like a headphone or speaker jack (approximately 3, 5 mm) and are labeled "Aux", "MP3" or "Audio". If all that is not available, you have to resort to other options presented below. However, there is a good chance that the two options no longer work for you too because the use of the Auxiliary audio cable connects the car phone to tape outdated technology. If your car does not have the "Aux" outlet, then there is no substantial likelihood that your car does not yet support Bluetooth. But do not worry, if all the way to connect mobile phones to the car is no match, you can install additional tools for car stereos.
When you have everything ready, just plug one end of the additional audio cable into the headphone jack of your and the other end into a power outlet in your car stereo. Connect is barely interrupted due to a direct cable connection.

Bluetooth


When the car is already supporting Bluetooth technology as the latest car audio systems, how to connect the phone to the car with your Bluetooth audio streaming will cost you dearly. Well, Bluetooth car - ready and HP both cost so expensive real connection out of the question. However, in order to wear a Bluetooth audio streaming, your Bluetooth device must be connected to the "profile". Bluetooth profile is very likely not the same Bluetooth devices to connect both of them even though they are not the same benefits. If you can make them the same access "profile", then only one is left for you to do is to pair your device and you will start playing music. Disadvantages of wearing Bluetooth lies in the fact that it is a wireless connection, until the audio quality is slightly affected. This sort of thing also consume more battery power until almost required to install a phone charger in your car.

FM Transmitter


The way out is only suggested when the other two impossible choices. The issue of using an FM transmitter so that the audio quality that is totally dependent on radio highways in the area where you are. In places where highways jammed radio, the same problem could not take place. Problems such as the static and bleeding - overs can really make your experience listening to suffer. But if you do not have a choice, all you need do is to check whether your car radio to work (need to know that your radio may look broken just because you have a faulty antenna).

How Using Bluetooth Technology

Bluetooth technology allows users to exchange data and voice transmission between two or more devices, if these devices are in close proximity to each other. There are various ways to use Bluetooth technology, such as Bluetooth wireless earpiece connects to your phone for phoning while driving, connect your computer to a Bluetooth printer to eliminate the need for wiring in your office, etc. See step 1 below to learn how to get the best from your Bluetooth device.

Understand what can be done Bluetooth. Bluetooth is a wireless connection devices that allow you to "pair" the device so that the device can be connected to each other. For example, you can connect a headset with most smart phones, and allows you to speak without touching the phone. You can connect a wireless game controller on a computer or console cable so no need to think again. You can play music to your speakers via Bluetooth from your smart phone or laptop without having to connect it, or set up a home theater system without connecting any wires loudspeakers.
  •     Bluetooth maximum distance is 30 feet.
  •     Bluetooth transfer speed is about 24 Mbps maximum.
 Get to know your Bluetooth device capabilities. Each Bluetooth device may have one or more functions. For example, some phones allow you to use Bluetooth when the phone call, while other phones allow you to transfer files to and from other mobile phones. Every Bluetooth device has a slightly different functions.

Read the manual or consult the device manufacturer to determine how to use Bluetooth on the device.

Make a "pairing" Bluetooth devices. To use a Bluetooth device, you need to connect your devices to each other wirelessly, which is known as the process of "pairing". The process of "pairing" is different from one device to the other devices, but generally you have to have one device that is located on the mode of "listening", and the devices that are in the mode of "pairing". For example, if you pulled the pair a headset with your phone, your phone is in "listening" mode, and the headset is in the mode "pairing". Your phone will capture the existence of your headphones, and the connection will be implemented.

    
Follow these guidelines to your Bluetooth device to complete the pairing process. In most cases, you need to perform certain steps that enable the pairing on the device.
    
When pairing, you are usually prompted for a PIN before the connection is made. If you never set the PIN, the default PIN is usually 0000.
    
Pairing usually only be done once. During Bluetooth is enabled on the device, the connection will be done automatically in the future.

Saturday, January 14, 2017

How to Master Your Installing Crossovers

How and where you mount your crossovers depends on whether you use active or passive crossovers. A good reason to use an amplifier with a built-in crossover is that you don’t have to find an extra place to mount another component or run additional wires.

Electronic crossovers

Installing an electronic crossover is much like installing a remote-mount equalizer: You’ll typically want to mount it with the amplifiers to make it easy to add more amps in the future and easy to make adjustments to the crossover. As with an EQ, you want to mount an electronic crossover on a board and not directly to the metal body of the car.

Passive crossovers


If your speakers come with separate crossovers, you can mount them along with the speakers (inside a door, for example) if there’s room. But if you need to make adjustments to them, installing crossovers next to the amplifier is a good choice. As with EQs and active crossovers, avoid mounting passive crossovers directly to the metal body of the car.

Friday, January 13, 2017

Crossovers: Signal Traffic Cops In A Car Audio System

Not every speaker can play every frequency: Tweeters can’t woof and subwoofers can’t tweet. The signal that comes out of a car audio head unit is full range, meaning that it contains the full range of frequencies in a given piece of music or program material, from the lowest lows to the highest highs. Because a high-end car audio system usually consists of specialized speakers — subwoofers, midranges, and tweeters — that reproduce certain frequencies, there has to be a way for those frequencies to get separated and sent out to the appropriate speakers. That’s the job of crossovers, which act like signal traffic cops in a car audio system.

Crossovers come in two types, active and passive.


Get active


Active or electronic crossovers are always placed before the amplifiers in the car audio signal chain, and divide the audio signal when it’s still at line level or un-amplified (see Figure 17-7). Many amplifiers have an active crossover built in so you don’t need to add a separate component. They’re called active because electronic crossovers require a power source to work.

Figure 17-7:
An Audio- Control electronic crossover.
 
 

Passive resistance


Passive crossovers come after the amplifiers (but before the speakers) and filter an amplified signal. Passive crossovers are typically included with speak¬ers that offer more than one driver, such as component sets (see Figure 17-8).

Although more expensive coaxials come with outboard or separate passive crossovers, more typically, a small and simple filter called a capacitor blocks the low frequencies going to the tweeters and the midrange gets a full-range signal. The passive crossover networks that come with component speakers, on the other hand, include components called inductors that block high frequencies from the midrange. Many passive crossover networks allow adjustment of the crossover point and slope, which I cover in the following section.

Points, slopes, and orders


The crossover point refers to the frequency at which a signal begins to be attenuated or reduced by the crossover. For example, 75 Hz is a common crossover point for subwoofers, meaning that the signal begins to be reduced at above 75 Hz.
The crossover slope refers to the rate at which the signal is reduced or rolled off beyond the crossover point. This always occurs in multiples of 6 decibels (dB), and the higher the decibels, the steeper the slope (see Figure 17-9). Slopes are also referred to as orders: A first-order crossover has a 6-dB-per- octave slope, a second-order a 12-dB-per-octave slope, and so on.

Figure 17-8:
An Infinity component speaker set with passive crossovers.
Courtesy of Audio Control

Many car audio systems use an electronic crossover to divide the full-range signal from the head unit to individual amps. In other systems, a full-range signal is sent to each amp that has a built-in crossover. Usually a component speaker set’s passive crossovers further divide the signal between the midranges and tweeters. Very rarely are active crossovers used to entirely filter the signals in a system.

It’s almost always preferable to use the passive crossovers that are included with a set of speakers because they were designed specifically for the speaker’s response characteristics.

Crossover types


Crossovers come in three basic configurations:
Low-pass crossovers (also called subwoofer crossovers) filter out all but low frequencies for subwoofers.
High-pass crossovers filter out all but high frequencies for tweeters.
Bandpass crossovers filter out all but a predetermined band of frequencies, usually in the midrange area.
Electronic crossovers can include all three types of crossovers, whereas passive crossovers usually just include a low-pass or high-pass section.

Installing Equalizers Straightforward Components

Equalizers and crossovers are straightforward components to install. The hardest part is deciding where to mount them because space is usually at a premium in most vehicles.


An equalizer is always installed between a head unit and an amplifier. Some require a preamp or un-amplified signal, although some can accept an amplified signal from a stock head unit. Where you mount your EQ largely depends on what type it is: in-dash or remote-mount.

In-dash EQs


If you have the space, an in-dash EQ can be mounted above or below your head unit. Depending on the configuration of your dash, this could be an easy task or require hours of custom work. If you have room in your dash, some installation kits, which are brackets that hold a head unit in the dash, also have a slot for an EQ (see Figure 17-10). If you don’t have much room, you’ll have to have the equalizer custom-fitted in the dash, which is a task best left to a professional installer. Another option is to mount the EQ below the dash using an under-dash mounting kit.

Figure 17-10:
A Scosche installation kit with a slot for an in-dash equalizer.

Remote-mount EQs


A remote-mount equalizer is usually installed alongside a car audio system’s amplifiers. This makes it easy if you decide to add more amps later on because you can make a short wire run from the equalizer to the new amp — as opposed to running the wire from, say, under a seat if the EQ is mounted there to the trunk where the amps are installed. You should also locate the equalizer where it’s easily accessible because you’ll want to make adjustments to it.

Mounting your equalizer directly to the metal body of the car could cause it to pick up noise that radiates through a car’s chassis, instead, attach it to a wooden board that’s in turn attached to the car body. Be careful where you drill holes in your vehicle and always be sure you know what’s on the other side!

Thursday, January 12, 2017

All Things Being Equal : Equalizers

Years ago, an EQ booster was a standard part of any car audio enthusiast’s arsenal. Back before high-power amplifiers became available, an under-dash EQ booster served the dual purpose of adding a bit of extra power to a system and providing a crude means of adjusting the overall sound. But EQ boosters couldn’t produce any more power than an in-dash receiver and their signal processing capabilities were very limited compared to today’s high-tech equalizers, so they’ve fallen out of favor with most enthusiasts.

One school of thought that believes that if a car audio system is designed and installed properly, there’s no need for an equalizer or processor. After all, no amount of equalization can compensate for a system that’s poorly designed and installed. Instead, use of an equalizer or processor should be thought of as seasoning to a well-prepared meal and therefore used sparingly. An equalizer is designed to fine-tune a system and make small corrections, not compensate for problems caused by poor design or improper installation.

Divide and equalizer


By now, you’re probably wondering exactly what it is that an equalizer equalizes. Every sound you hear, including music, is part of the audible frequency range, which for humans is roughly from 20 Hz to 22,000 Hz. Below 20 Hz, you don’t so much hear sounds as feel them, which is why low bass has such as visceral, body-massaging quality. Above 22,000 Hz are sounds that only animals such as dogs can hear, which explains why those silent dog whistles work. Very few adults can actually hear sounds around 20,000 Hz anyway because high- frequency hearing quickly degrades with age.

A perfect car audio system would produce the entire frequency range with a flat, or even, response from 20 Hz to 22,000 Hz, with no deviation. But audio equipment and particularly speakers are far from perfect. Maybe that’s a good thing because a flat frequency response sounds ... well, flat. After all, who doesn’t want to crank the bass a bit every now and then even if it’s not balanced perfectly with the rest of the system?

A relatively flat frequency response — one with an equal amplitude or signal strength across the audible frequency spectrum — is the ideal, but it does not define a good-sounding car audio system. Instead, it’s an ideal to shoot for, and an equalizer, which allows tweaking or adjusting the frequency response of a system far beyond the simple tone controls for bass and treble found on a head unit, lets you get closer to that ideal. 

Equalizers do this by boosting (increasing) or cutting (decreasing) the gain or amplitude of an audio signal within a band (range) of frequencies. Equalizers may have several frequency bands that are fixed or unalterable, or may allow adjusting the center frequency, which is the primary frequency at which the adjustment takes place.

The segment of the audio spectrum that a frequency band covers, say 50 to 100 Hz, is known as the bandwidth. Related to bandwidth is an equalizer’s Q factor, which defines the way in which the range of frequencies within a band of control are affected. A smaller Q means a wider range of frequencies are affected by an adjustment of the equalizer, whereas a larger Q means a narrower range of frequencies are affected.

One more tech term you should be familiar with is octave. Octave is a musical term that refers to an interval between one musical note and another that’s half or double its frequency. So if 100 to 200 Hz is one octave, 200 to 400 Hz is another, and 400 to 800 Hz is the next. The most sophisticated equalizers are known as one-third octave because their bands are spaced one-third of an octave apart, as opposed to basic EQs that spread control over several octaves and allow less precise adjustments. 

Types of equalization


Beyond where they’re mounted (in-dash or in a trunk), car audio equalizers are generally classified in one of three types:

Graphic: These types of equalizers have a set of fixed frequency bands fj over which adjustment is allowed (see Figure 17-1). The term graphic 1 relates to the fact that you can see a graphic representation of what the I equalization curve or response is supposed to look like because the sliders or controls on a graphic EQ are set in a way that mimics the amount of boost or cut at each center frequency.

Figure 17-1:
A dis-continued Pioneer graphic equalizer.


Parametric: Parametric equalizers (see Figure 17-2) allow adjustment not only within a certain frequency range, as with a graphic EQ, but also permit varying the center frequency at which the adjustment takes place. Some also allow varying the Q factor of the affected frequencies.

Quasi-parametric: These equalizers allow adjustment of the center frequencies but do not offer adjustment of the Q factor of an equalizer (see Figure 17-3).
Types of equalizers

Equalizers are also categorized by where in the vehicle they are usually placed: the dashboard or the car’s trunk.

Figure 17-2:
An Audio- Control parametric equalizer.
Courtesy of AudioControl


Figure 17-3:
A Kicker quasi- parametric in-dash equalizer.


In-dash equalizers


For years, most in-dash equalizers (see Figure 17-1) were graphic EQs and were basically the descendents of EQ boosters. (In other words, no serious car audiophile would be caught dead with one.) But many modern in-dash EQs are of the parametric variety and offer added-value features (see Figure 17-3), such as subwoofer crossovers (which allow adjusting the amount and character of bass via the amplifier that’s driving the subwoofer) and auxiliary inputs (that allow adding another audio source, such as an iPod). The biggest advantage of in-dash EQs is that they allow making adjustments on the fly.

Trunk-mount equalizers


These equalizers have their roots in the pro sound world, mixing for concerts and in recording studios. They are typically much more sophisticated than in¬ dash equalizers and allow more precise control over a system. They are also usually more expensive. Trunk-mount equalizers (see Figure 17-2) are usually one-third octave equalizers and are of the set it and forget variety. To adjust them properly usually requires an excellent ear or a device called a real-time analyzer (RTA) that measures sound, or both.

Some aftermarket and even factory car audio head units also have simple graphic equalizers built in. Although they can be helpful in tweaking a system, they are limited in their function and scope.

Signal processors


Car audio signal processors come in a wide variety of prices and offer a broad range of features (see Figure 17-4). Some do only one or two things (such as boost bass or increase the line-level or unamplified signal from a head unit so that the overall system has less noise), whereas others do everything from equalization to time alignment, which is delaying the signal going to certain speakers so that the sound from all the speakers in a system arrives at a listeners’ ears simultaneously.

Other functions you’ll find on car audio signal processors include

Surround-sound processing for movies and music

Sound-field processing that adds effects to recreate the sound of a certain space, such as a cathedral, concert hall, stadium, or jazz club

Crossover that sends certain frequencies to certain speakers

Additional inputs for adding auxiliary audio sources such as an iPod or other portable music player
Circuitry that enhances the sound of compressed-audio formats such as MP3 

Figure 17-4:
A Pioneer in-dash signal processor.

OEM integration processors

These days, more and more people want to hang onto their stock head units, because either they’re leasing the vehicle and can’t alter it, the head’s a hassle to remove, or they don’t want to lose some of the functions tied into the factory radio. The tricky part is that they still want better sound than the factory system offers. This can be accomplished by adding components downstream of the stock head.

Devices called line-level converters that can take a stock head unit’s high-level or amplified signal and bring it down to line or unamplified level have been around for quite a while. But some of the latest OEM systems add equalization that’s designed to work only with the components in the stock system. So a new generation of OEM-integration processors has become available to filter out this equalization, which can wreak havoc on an aftermarket system (see Figure 17-5). Alpine’s latest OEM integration processor, the PXE-H650H (see Figure 17-6), even comes with a microphone that listens for sonic anomalies and makes corrections to compensate for them. 

Courtesy of JL Audio
Figure 17-6:
Alpine's
PXE-H650
OEM-
integration
processor,
with
microphone.
Courtesy of Alpine

Wednesday, January 11, 2017

Make Your Car Audio more Equalizing, Processing, and Crossing Over



In This Chapter
► Tweaking with equalizers and processors
► Using processors for OEM integration
► Understanding crossovers
► Installing equalizers and crossovers





The Interior of a vehicle is one of the worst possible places in which to achieve good sound reproduction. Vehicle occupants sit too close to some speakers and too far away from others. A car’s interior is made of hard surfaces, like glass, that reflect sound and soft surfaces, like upholstery, that absorb it. Add to that road noise, wind noise, and engine noise, and you have an environment that is downright hostile to high-quality sound.

Although it’s possible to design a system that helps compensate for these enemies of hi-fi — by pumping up the bass to mask low-frequency road noise or locating speakers so that they don’t bounce off glass, for example — the best way to alleviate if not eliminate these anomalies is by using car audio equalizers and signal processors.

Included in the category of car audio equalizers and signal processors — quite literally since they are sometimes built in — are crossovers, which direct specific frequencies to specific speakers. Crossovers can either be active or passive, and many times a high-end car audio system uses both.

Finally, a recent trend in car audio is OEM integration, which means upgrading a stock stereo system with aftermarket components. Some car owners want to keep the factory look and functionality along with their stock head unit. And because stock head units have become more sophisticated and more integrated into the dash, you can no longer simply remove a head unit and start your installation from scratch. And simply taking the high-level or amplified signal out of a head unit isn’t always straightforward. That’s where the latest generation of OEM-integration processors come in.

How to connect music in Hp to Car Stereo

One similarity of some people who buy hp namely the desire to put their new gadget not only for communication but also for entertainment, ...

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