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    Using Bluetooth For Wireless Mp3 & Digital Audio

    Bluetooth is a technology that uses radio frequency over a short range. It is designed to provide a way to transmit signals in an inexpensive but reliable way without the use of wires. The Bluetooth technology eliminates the need to use a cable to connect nearby personal gadgets like cell phones, notebooks, headphones, MP3 & digital audio devices. It delivers secure voice and data transmission, creating a host of useful applications.

    One such application of the Bluetooth technology is wireless connection between audio systems such as MP3 & digital audio devices. This application is indeed very useful. For instance, if you want to listen to music while you are on the move such as when jogging/running or working out at the fitness gym, using a regular music player and headphone combination would mean constraints to your movement because you need to watch out for the cable connecting the player with the headphone. With a Bluetooth MP3 & digital audio device, you can are free to move while listening to your favorite tunes.

    Likewise, a Bluetooth MP3 & digital audio device makes a great home entertainment gadget. Stay connected with your PC with a Bluetooth headset - you will not disturb your housemates and you can walk around the house or relax in another room while using your home PC as an entertainment center.

    Learning the Technical Details

    The standard bandwidth for a transmission device to deliver audio with CD quality is 1411.2 kbps but the highest-level bit rate that Bluetooth can achieve is only 721 kbps.
    To solve this lack of bandwidth, Bluetooth mandated the use of Sub-band Codec that Philips developed which has no royalty charge and is low-complex. The Codec ensures that a Bluetooth MP3 & digital audio player will reduce the size of a CD-quality audio file to fit into the bandwidth of Bluetooth and then the receiving headset or speaker will decompress the streamed data prior to playing it out.

    The specific procedures that Bluetooth technology uses to stream audio content through Bluetooth MP3 & digital audio players are defined in the Bluetooth Advanced Audio Distribution Profile or A2DP. A device that implements this particular profile will be able to function either as the source of streaming audio (the music player) or the "sink" of the streaming audio (headset or speakers). The Bluetooth Advanced Audio Distribution Profile is also the basis for maintaining quality of service and the high-quality transmission of audio content.

    Conclusion

    The use of Bluetooth to deliver audio wirelessly has indeed revolutionized the audio industry and more applications of digital audio via Bluetooth are expected to be discovered, creating a fast-evolving and more interesting mobile and aural experience to end users.

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