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Message: <blockquote data-quote="laal" data-source="post: 8736127" data-attributes="member: 94459">The Audio Codec is a circuit that controls sound signals in a cellphone circuits. It acts like an audio amplifier or an audio mixer or a sound booster.Audio codec is the main area in a mobile phone where all audio  properties is being process, during transmission and receiption. It  converts the sound signal into radio frequency signal, and also converts  radio frequency signal into a sound signals.Like for example a microphone's sound signal is being amplified then  converts and feeds to radio frequency before it send to the network  airwaves. Opposite to that process is the conversion of radio frequency  into an audible or understandable sound, and that sound is that what we  hear on the earpiece speaker. A typical block diagram below show  how audio interfaces being connected to an audio codec circuit.<a href="http://1.bp.blogspot.com/_8JZhVVmpICU/S_Lc7PUJmhI/AAAAAAAAAYQ/fqHxl3UEFHI/s1600/audio+block+diagram.jpg" target="_blank"><img src="http://1.bp.blogspot.com/_8JZhVVmpICU/S_Lc7PUJmhI/AAAAAAAAAYQ/fqHxl3UEFHI/s400/audio+block+diagram.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a>The  Audio codec is the main part which control all audio properties from  all audio interfaces like the microphone, earpiece, IHF (integrated  hands free) speaker or a buzzer, ringer, head set and vibrator motor. A  typical audio circuit is being filtered from any sound interference  signal to avoid sound interruptions.</blockquote>

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