THERE ARE AUDIO CODEC ICs THAT COMPRISE AN analog-to-digital converter (ADC) and a digital-to-analog converter(DAC) around some processing hardware, but they are the tip of the proverbial iceberg. These days, most engineers think of audio codecs in terms of compression and decompression algorithms that run on DSP platforms. In the range of audio frequencies, "voice" codecs suit digital telephony, while "audio" codecs (as the term is generally understood) fit entertainment audio.
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