| http://www.w3.org/ns/prov#value | - By the way, the output of the digital-to-analog converter 139 is subjected to analog signal processing such as amplification in some cases. [0040] Furthermore, it is also made possible to supply the audio signal outputted by the digital-to-analog converter 139 to the speaker 143, which is attached to the obverse of the terminal, via an amplifier 142 and output the audio signal from the speaker 143
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