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A home theater audio receiver is the ideal system for those connoisseurs of music who prefer surround sound system. Though the music systems are tempting for any music lover, yet they may found variations in the sound effects. However, one should ensure that the system works in perfect sync with his home theater and according to his delight.

One can opt for additional facility like automatic speakers calibration to make his music system more potent. The system analyzes the sound coming out of the speakers and adjusts it accordingly to produce optimum sound effects. You can also get digital processing facilities as well as digital inputs and outputs. If you are using the system for the first time, it is advisable to go through the catalogue and the demonstration tapes to accustom yourself with the endless choices at your disposal.

*Experience Best Sound

The surround sound effect of a home theater audio receiver is similar to the sound effect that you normally experience in a commercial theater. There a few things to take care of for getting the best out of your music system. The finest sound quality is experienced at 5.1 surround. It is, therefore, important to ensure that the system one buys offers at least five channels or option to amplify sound to those levels.

If you enjoy your video games, movies, music, and TV shows, then makes sure that the receiver delivers sound quality that maximizes the value of entertainment. The latest receivers can also offer more choices in sound delivery system. Many of them have inbuilt high-definition formats. After turning on the speakers, one needs to decode them to increase the surround sound effects. This can be done with a home theater audio receiver.

It needs to be ensured at the time that the power of the receiver matches that of the speakers that one is using. To check the compatibility, you will need to determine the sensitivity of the speakers. If you have a next generation 6.1 channel home theater audio receiver, some movies that you play might not get decoded. The standard receiver is of is 5.1 level at present. Hence the system will work at its optimum on this standard.

*Receiver Is The Central Point Of The System

The receiver acts the central point of the entire system. It performs a variety of functions like switching on all your audio and video components, decoding the surround sound system, bass management, and signal processing for simulated sound fields. It also drives the loudspeakers by amplifying the audio signals. Additionally, it also serves as an AM/FM radio tuner. With all these functionality, the receiver is one of the most complex and expensive component of the home theater audio receiver system.

We can do with a few more details on the surround sound decoding process. The source material contains surround sound in coded format, and one needs to decode them into separate channels to power separate loudspeakers. As we have seen earlier, the current de facto standard is 5.1 channels. Of course, 6.1 channels are also widely available. But very few movies and channels are encoded at this level or have extended surround sound formats.

A home theater audio receiver is the heart of the home theater system. It provides almost all the inputs and outputs that one can connect into, including your television. It provides an effective and professional way of centralizing the home theater system. However, you must base your choice on specific needs and area. It would be better if one actually tries out the system and check out its sound quality and additional facilities before going for an installation.

The latest series of wireless audio transmitter devices promises streaming of music throughout the home without limits. We will look at various products and technologies to find out in how far these devices are effective for whole-house audio applications and what to look out for when buying a wireless system.

Infrared wireless audio devices are restricted to line-of-sight applications, i.e. only function within a single room because the signal is sent as infrared light which can’t penetrate walls. This technology is often found in wireless speaker kit products.

RF wireless music devices broadcast the music signal via radio waves. These radio wave signals can without difficulty go through walls. The signal is broadcast either by utilizing FM transmission or digital transmission. FM transmission is cheap but quite prone to static, audio distortion and susceptible to interference.

Digital wireless audio transmitter devices, such as products from Amphony, make use of a digital protocol. The audio is first converted to digital data before being broadcast. This method guarantees that the audio quality is fully preserved. Some transmitters utilize some form of audio compression, such as Bluetooth transmitters, which will degrade the audio to some degree. Transmitters which send the audio data uncompressed will achieve the highest fidelity.

Wireless LAN (WLAN) products are practical when streaming from a PC but will add some amount of latency or delay to the signal because wireless LAN was not originally designed for real-time audio streaming. WLAN receivers ordinarily require buying a separate LAN card to be plugged into every receiver.

Powerline products send the audio via the power mains and offer great range. They run into problems in homes where there are individual mains circuits in terms of being able to cross over into another circuit. Also, these products build in a delay of a number of seconds to safeguard against transmission errors during power surges and spikes which prevents their use in applications where the audio from wireless loudspeakers has to be in sync with other non-wireless speakers or video.

Here are some recommendations for picking the optimum wireless audio system: Try to find a system that can run several wireless receivers from a single transmitter. Ideally an unlimited number of receivers should be supported. That way you don’t need to buy extra transmitters when you start adding receivers in several rooms of your house. Some devices have some form of error correction built in which will help guard against dropouts in case of strong wireless interference. Choose a digital RF audio transmitter to guarantee that the audio quality is preserved. Make sure the audio delay is smaller than 10 ms if you have a real-time application such as video.

Select a transmitter that has all of the audio inputs you need, e.g. speaker inputs, RCA inputs etc. Get a wireless system where you can buy separate receivers later on. You should confirm that you can get receivers for all the different applications you have. Such receivers may include amplified receivers for passive speakers or line-level receivers for active speakers. Select a transmitter that can regulate the audio volume of the input stage. This will give you the flexibility to connect the transmitter to any kind of equipment with different signal levels. Otherwise the audio may get clipped inside the transmitter converter stage or the dynamic range is not fully utilized.

Check that the system provides amplified receivers with a digital amplifier to ensure high power efficiency. This will help keep the receiver cool during operation. Also, make sure the amplifier provides low audio distortion. This is vital for good sound quality. Verify that the amplified receiver is able to drive speakers with the preferred Ohm rating and that it is small and easily mountable for simple installation. Products using the less crowded 5.8 GHz frequency band will normally have less trouble with wireless interference than 900 MHz or 2.4 GHz products.

Cables and cords are essential to operating your favorite device. Component video separates the video signal into individual streams and these video streams are carried via three cables, colored red, and green and blue that normally comes bundled with RCA type jack connectors. Component video signals will provide better color resolution, purity and fidelity than S-Video and composite video signals.

For electronics like televisions, digital cameras and camcorders there are DVI cables, HDMI cables and S-video cables. Also, HDMI cables are used for content management. For example, a manufacturer would use it to enable service providers to control access to specific content.

DVI stands for Digital Video Interface, while HDMI stands for High-Definition Multimedia Interface. The biggest difference between DVI and HDMI is that DVI is used solely for video and HDMI cables carry both the video and audio signals through one signal. There are RCA cables, which are also known as composite cables, which include one connection for video which is usually yellow and it includes parts for left and right audio channels, which are usually white and red respectively.

Audio video Cables are higher quality analog video cables which are generally used in hooking up your television, VCR, DVD player, or similar to another video source, such as a computer. There are also component cables which are essentially providers of higher quality and better signal throughput.

The principle idea behind HDMI is the use of a single interconnects instead of several cables when connecting an audio video source, such as a set top box or DVD player and an audio and or video monitor, such as a plasma TV, over a single HDMI cable.

The use of a single HDMI cable that replaces the maze of cabling behind home entertainment centers is the primary advantage brought about by this new standard. This is not the case with DVI supports digital video only hence, a separate audio cable is needed to transport digital audio when a DVI cable is used.

Audio Video cables are used to hook up receivers, tuners, radios, stereos, micro shelf systems and speakers. Other cables that are also used in audio video equipment are optical cables which are used to transmit light as the signal and coaxial cables. For cords, some of most popular are actually wire harnesses which are used in cars to power a car stereo. For more details http://www.av-setup.com

Audio books have been known for its benefit in reading classes. Compared to the traditional story-telling in schools, listening to audio books have been found effective in enhancing a child”s listening skills and teaching proper pronunciation of words. While many educational researchers have contended the use of audio books in schools as these might promote laziness in reading among kids, more and more schools continue to play CDs and cassette tapes during reading time because of the audio books” convenience and practicality.

Since audio books can be costly when bought from bookstores, teachers resort to download audio books free from many websites. However, not all the audio books available online have a good quality.

When downloading audio books, the first thing to consider is the clarity of the recorded reader”s voice. Teachers who download free audio books should be keen on the quality of the voicing, sound beds, and sound effects. The sound bites should aid in keeping the attention of children and not in distracting them.
These and other information book lovers need to know before they download audio books free are available from websites that offer free audio books. You can get the best quality of books from these websites and save some time to do other activities rather than searching from one website to another for good audio books.

Most of the website offering free audio books also offer a wide selection of books written by popular authors from the works of Stephen King and Dan Brown. With over 85,000 titles, you can surely find that book you”ve been eyeing for so long. It gives an easy step-by-step procedure when you want to download free audio books so you can never go wrong. For as long as you have a reliable internet, you can have the luxury of listening to your favourite novel anytime anywhere.
So when you”re looking for high quality audio books, all you have to do is visit the website and click on your favourite title. Put on your headsets and earphones, relax, and enjoy the book.

Home theater systems are a present in homes installed for the purpose of providing cinema quality video and audio duplicate. It includes television and video equipment with special audio systems integrated – like surround sound. Have a look below configuration of some branded home theatre systems:

(1). Home Theater System – 5000 PMPO

Home Theater System – 5000 PMPO – 5.1 with 5.1 channel DVD player with USB & SD card slot + Mpeg and Divx Features:

.Subwoofer, Speaker type: 5.25 woofer
.Impendence: 4 Ohm
.Frequency Response: 40- 300Hz
.Efficiency: 92dB, Satellite
.Speaker type: 3.0 woofer, Impedance: 4 Ohm
.Frequency Response: 200- 18KHz
.Efficiency: 85dB
.Input Sensitivity: 500mV
.S/N Ratio: 75dB

Accessories: .

.5.1 Subwoofer/Amplifier Unit
.Phone to 3.5mm jack socket
.Phone AV jack Plug, Remote control Unit
.Combo with Latest and most advanced DVD player by VOX
.1200 lines high clarity pictures
.32 kind of captions, 8 languages
.5.1 sound track output
.Simulation DTS Digital Audio – Frequency output
.Dolby Ac 3 output & Digital coaxial output
.Optical Fiber output & S Video Output
.Complete function digital karaoke
.Support SD/MMC card, USB and Game port

(2). 5.1 Home Theatre System – 6200 P.M.P.O


.5.1 Home Theatre System with Display and Remote
.Output Power : 6200 Watts P.M.P.O
.Professionally designed built-in amplifier, subwoofer and satellite speaker designed.
.5.25″ professionally enhanced subwoofer driver.
.Outside heat sink designed.
.Dynamic bass boost, Low distortion.
.The system can be connected to DVD and any other Audio output equipment.
.The system is magnetically shielded which can be put near the monitor or TV and without magnetic influence.
.Remote Control designed.
.AUX and 5.1 CH switch Function.
.Point hosters Power are pointing remote control on Power machine start job aboard first.
.When playing the music, adjust all control knob to demanding level.
.Power Output : 30 W + 10W X 5
.Frequency Response : BASS : 10Hz ~ 300Hz
.Control : Volume , Mute, Menu, 5.1 /AUX / Remote


.Subwoofer Speaker :1 pcs
.Satellite Speaker : 5 pcs
.Audio Cable : 6 pcs, User
.Manual: 1 pcs
.Remote Control :1 pcs

Author suggests you to buy home theatre speakers from homeshop18 and get maximum discount.

Did you know that A trucker working to the legal limit in the U.S. can rack up to 3,432 driving hours a yearnearly 10 times that of the average New York commuter or enough to listen to the unabridged audio book version of Bill Clintons My Life 77 times? (Publishing Trends, Market Partners International, September 2005).
Think of the way audio books could optimize your time management. Audio books can turn the day to a 26 hours day. Yes, audio books can add extra two hours each day. Still not convinced? Did you know that The average rush hour driver will spend an additional 62 hours stuck in trafficat standstilleach year and that More than 97 million workers drive alone to work each day.

Well, enough with that pile of useless data, Think about yourself what have you been doing while driving – Listening to the radio? Making unnecessary calls with your mobile phone? Wasting valuable time?
Now close your eyes and imagine you could read the last edition of the New York Times, Read the last Harry Potter book or learn Chinese all simultaneously while driving your car. Now open your eyes and stop dreaming, you can do it all now. The only difference is that you are going to use a new method of reading listening to audio books.

And it is so easy: You may get audio books in different formats from books on tapes and audio books on CD to downloadable audio books. You can get it from different sources libraries, book and music stores and online audio book sources. You could buy audio books, rent audio books and even get free audio books. According to eBrain Market Research survey, 71% of the audio book listeners listen to them on long car trips.

Believe me; I couldnt wait getting into the heavy morning traffic listening to the audio book IT by Stephen king. In fact, I couldnt resist listening to it at home after work. I love audio books.

The concept of forensic audio investigation may have become popular in recent years along with the forensic sciences in general but it’s been in practice since World War II. With audio use in full swing for radio transmissions across long distances, scientists were trying to identify the voices of their enemies among the many radio broadcasts that took place on open frequencies. The work done in forensic audio investigation today is based on the pioneer work of those scientists.

Specifically, forensic audio has to do with any type of audio of an evidentiary nature. In modern cases, law enforcement or other legal professionals (e.g., defense attorneys and prosecutors) will turn to a forensic audio examiner to perform any one of a number of services where audio is concerned.

In many cases these specialists are hired on a contract basis.

While the most common Hollywood portrayal is audio enhancement with a few twists of a knob (if only it were so easy) there is a great deal of work that can be done:

* Audio Enhancement – the most common and offered by just about every forensic audio company you can find.
* Audio Authentication – geared toward tape and digital formats
* Forensic Transcription
* Speaker Identification

There are also a number of other services or procedures that can be classified in their own right as a specialty process or “miscellaneous” in terms of categorization. This article will focus specifically on Audio Enhancement and Authentication.

Audio Enhancement

Audio enhancement is the most common and well known service where forensic audio is concerned.

It’s not likely that one can take a garbled and mangled inaudible conversation and “tweak it” to produce clear speech that is intelligible. While audio enhancement isn’t specifically focused on speech, that is usually the intent behind cleaning up or enhancing audio for legal purposes. It’s a means of reducing or filtering out unwanted noise from a poor recording in order to clear up the speech that’s covered with noise or is a victim of poor recording methods.

A forensic examiner is not a miracle worker however, and while modern software and equipment has provided a variety of tools to improve the quality of speech in a recording, there are still limitations. When it comes to enhancing speech, you can’t fix something that’s just not there. If the recording doesn’t contain the robust elements of someone’s speech, and the equipment only picked up bits of a word or phrase, there is no magic software to fill in the blanks. Enhancement techniques can sometimes have fantastic results with intelligibility, but more often would be a disappointment to the layperson.

In terms of speech enhancement, an examiner can offer critical listening in combination with forensic transcription and speech decoding methods to help identify and discern what is being said. Again, technology can only do so much so an examiner with linguistics and phonetics experience is usually best for the job. However, if the speech waveform isn’t picked up by the recording device or is masked by noises of the same frequency range, he won’t be able to decipher the speech.

Forensic audio enhancement sometimes simply involves increasing the volume of a whisper from a suspect where traditional playback – even at high volume – can’t help an individual understand the utterance. Audio enhancement offers the most benefit in situations where noise can be eliminated or at least reduced so as not to distract the listener from the speech. Enhancement techniques are quite good at getting rid of electronic buzzing or hum and other noises such as tape hiss, the crackles and pops of a phonograph record or the beeping of a backing truck, open car door, low battery warning of a fire detector, etc. Enhancement used in this way is often called improving the listenability of the recording. Unintelligible speech isn’t made intelligible but the recording is easier on the ears.

Audio Authentication

Authenticity is an important part of legal matters where evidence is concerned. This is especially true when it comes to audio that is or will be entered into evidence in a criminal or civil matter. As technology advances, it becomes progressively easier for an individual to tamper with a recording.

Audio authentication – either involving tape authentication or digital file authentication – is a way to ensure that the audio being utilized as evidence has not been tampered with in some way.

Not only will a forensic audio examiner use software to examine the actual recording, but authentication involves examining the physical tape itself and its casing.

This includes:

* Checking the tape for splices
* Examining the tape’s plastic shell to check for prying or disassembly
* A process of examining the tape call magnetic development

Magnetic development involves using a magnetic liquid called ferrofluid in the examination of audio or video tape. The ferrofluid allows the forensic examiner to see the magnetic patterns on a tape. The types of things the audio engineer would look for include magnetic signatures left by stopping, pausing and starting the recording process. It can also be possible to tell if the tape has been recorded over or simply erased and left blank.

Newer software provides an edge when it comes to detecting authenticity in audio as it looks into variances that could lead to falsification of a recording – particular in tape recordings:

* Equipment noise – hums, pops, varying pitch in inconsistent forms over the whole of the recording
* Fading – Any gradual or sudden decline in volume that effects the interpretation of noise or dialogue. If the sound cuts out completely that becomes a gap in the recording
* Gaps – Any segment where there is a change (often unexplained) in the content or context of an audio recording. A perfect example of this is the infamous Watergate recording where there is an 18 and minute gap in the recorded audio that was later discovered to be an overlaid recording of electrical interference.
* Transients – These are clicks or pops and other “attack” sounds within a recording and may signify that there has been a splice or some other alteration to the recording

There are a number of methods that are used to authenticate a recording, checking it specifically for originality. An obvious and important tool that a forensic audio examiner has is the ear. Critical listening affords a great deal of benefit and it takes training and experience to know what to listen for while playing a track over and over.

In some cases, an examiner may have to run through a section of audio many dozens of times. They examine bits of a conversation or sections of a recording to fully understand the sounds – including both foreground and background sounds. If something stands out the examiner will further investigate that specific segment using their trained ear to discern if the recorded event is authentic or not.

Beyond listening, the examiner utilizes physical inspection as well as spectrum and waveform analysis to visually inspect the quality and construct of a specific piece of audio. All of these methods come together allowing the examiner to certify the authenticity of a tape recording.

Things become more difficult when a recording is made using a digital recorder that creates audio files such as .wav or .mp3. While many of the above methods may be useful with a recording that originated as a digital file, it is somewhat easy for a knowledgeable person to edit the file without leaving any known sign of doing so.

One promising method of digital authentication is the use of ENF (electric network frequency) data. Whenever someone is recording while plugged into an electrical outlet or using a battery operated device within an ENF magnetic field, their recording will include a 50Hz or 60Hz (depending on country) waveform signature. This signature can be compared to an ENF database to possibly determine where and when the recording was made, whether it’s an original or a copy, or whether it was edited or altered in anyway. Digital audio authenticity examination, and more specifically the use of ENF, is in its infancy and has a way to go before forensic audio examiners reach the level of sophistication that has been achieved with authentication of analog tape recordings.

The use of software to determine authenticity and enhance audio is just the beginning when it comes to forensic audio. Depending on the situation, additional specialty services or skills may need to be applied such as speaker identification and the analysis of gunshot sounds to determine if more than one weapon was used, which type of firearm was used, or the sequence of the shots fired. Forensic audio is a robust trade that encompasses a number of specialists who work together to bring clarity through the study and examination of audio.

The human mind goes through several wave cycles everyday. Each of these waves is associated with a different conscious state of the brain. Altering these waves will alter mental states. Most of the brainwaves fall below the audio limit of human ears (20 20,000 Hz). Binaural beats provide a convenient access to the frequency range of the brainwaves. They have been known for over 170 years and can be easily used to explore and awaken various brain states.

Audio recordings with embedded binaural beats have opened up a lot of opportunity for personal growth. They offer the most convenient and quick way of reaching the subconscious mind that is not possible with any other technique. For example, every one wants to stay away from stress and anxieties of daily life, but hardly anyone is adept at relaxing at will. Listening to binaural beats recordings can straight away put you in a highly relaxed state within minutes. No other technique can relax you so easily and so fast.

Binaural beats can be embedded music

Binaural beats are not sound waves so do not hear them through ears; they are created in the brain when two slightly different audio frequencies are fed one through each ear. For instance, if a frequency of 350 Hz is fed to the left ear and 360 Hz to the right ear, binaural beats of the difference frequency, 10 Hz is generated in the brain.

These are embedded in the recordings of some pleasant sound like that of ocean waves, flowing river, waterfall or rain etc. These pleasing natural sounds generate a relaxing and receptive mood, which further assists in the functioning of the binaural beats.

Brainwaves and entrainment

When the recordings are played, the current dominant brainwave shifts to match the applied binaural beats frequency. This tendency to synchronize with the applied signal is called entrainment (or frequency following response). After entrainment, if the frequency of the beat is changed the brain follows it. So, now what brain state is experienced depends on what the frequency of the beat is.

Just by changing the frequency you can explore states of deep sleep in the delta wave region (0-4 Hz), generate meditative or dream states in the theta wave region (4-7 Hz), or relaxed wakeful states of the alpha waves (7-13 Hz). The manner in which the beat frequency is varied depends on the purpose at hand.

For instance, for lucid dreaming you would like to be in the theta brainwave state where dreams occur. But you would go for a brief trip to the alpha state where you have awakened awareness, and quickly come back to the theta state again. Hence, the person dreams and also knows it because of the brief excursions to the waking alpha state. Recording for the purpose of meditation will have different binaural beats. I think you got the general idea.

Availability of music with binaural beats has opened up an entirely new facility for ordinary folks to develop their personal capabilities at the most basic level. They offer an amazingly simple and quick way to awaken the hidden potentials of mind.

Subliminal affirmation software are what we refer to as computer programs that create either a visual or audio representation of your affirmations. In the case of affirmations using visual subliminal you have a program similar to a screen saver that displays the positive affirmations on your screen for a very short moment. All of this happens so quickly that you don’t realize that a subliminal message was displayed; all at the same time your unconscious captures the message and registers it along with thousands, if not millions, of other information it is processing.

In the case of sound files, or subliminal affirmations mp3s as they are also known, the software transforms the audible affirmations so that you can no longer consciously hear them, yet your unconscious mind picks up the messages and stores them.

Subliminal affirmation software are great tools that technology brings us for easy and effective personal change. Using this specialized software, you can take positive affirmations and digest them through subliminal technology, delivered to you either visually or in audio. The best part is that while you can use your conscious mind to choose to create the positive affirmations, you leave it to the software to deliver the messages to your unconscious.

Your unconscious mind is constantly processing everything that comes to its attention. All information is stored; according to some scientists, on a permanent basis. You can use subliminal affirmation software to create a steady flow of desired statements straight into your unconscious mind’s attention. As the affirmations are repeated, your unconscious considers these as reality. This is the way our unconscious works; if the information keeps coming in and is the same, then it assumes it to be true.

You should be careful when you choose your positive affirmations. Let’s be clear here: We’re stepping under our conscious mind’s radar and planting seeds in our unawareness zone. Whatever you put there will be considered to be true. So don’t start a self talk with yourself saying things that are untrue to who you really are. Your conscious mind will detect it as a core value violation and will ignore it. You won’t benefit from your investment if you’re not careful.

Make sure you are true to yourself when you start making your own subliminal affirmations. Your subliminal affirmation software needs to have the flexibility to choose your own personal affirmations. You also have to look at features for instance update frequency for visual affirmations or different choices to encode audio, if you are utilizing the computer program to generate subliminal affirmation mp3s.

You know when you hear one of your favorite artists is coming into town, and without hesitation, you part with an absurd amount of money to spend, at most, two hours watching them perform? Part of your motivation is because you love this artist, and their music likely served as the background theme songs to pivotal moments in your life – or you just love to sing along in your car.

The other part is the anticipation of the performance itself. You hope it will be captivating. While the artist’s musical ability certainly plays an important role in how spectacular the performance is, they wouldn’t be able to dazzle without audio visual equipment. The same is true for the Oscars, highly televised events, and pretty much every famous performance you can recall.

And it’s why you should definitely hire audio visual equipment for your next corporate event. Of course, there’s no real need for you to host an event that would rival a Rihanna concert (although it wouldn’t hurt) but creating the best possible atmosphere for your guests can only reflect well on your company.

Whether you’re holding a conference, gala dinner, exhibition, award show, exhibition, or any big event, the special occasion requires audio visual equipment to be memorable.

Audio visual equipment can include many things, such as:


Mixing decks

Data projectors

Video walls

Plasma screens

Data projectors

Exhibition audio kits

While the above is nowhere near an exhaustive list, it does highlight how many other options there are for creating a great corporate event. Leave PowerPoint’s for the conference room and use a wall screen to set the atmosphere for the evening. A wall screen or projector is also a great choice if you’re giving out awards. You can use the projector to highlight some of the nominee’s best moments.

Hiring audio visual equipment allows you to get creative when planning your event, and your guests will surely thank you for it. Even if your guest will only include current employees, hosting an impressive event is also a great way to boost company morale.

If you have never planned a big event, an event planning company that provides audio visual equipment can help you create an event that perfectly reflects your brand. They can also provide solutions specifically designed for the kind of event you’re holding and spacing parameters of your location.

There’s no reason for your event this year to be the exact same as it was last year. Hiring audio visual equipment is a great way to differentiate your brand and create a truly memorable event. If you’re lucky, guests will remember your event as fondly as they remember their favorite concert.