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How making Digital Volume Control for audio ?

using DS1669
Digital Volume ControlDigital Volume Control audio

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Making Digital Volume Control for audio in this series can use a digital set the volume control ,  although the tone control is the volume available, but we can make a volume control with a series.

to use this series, release potensiometer the tone control that serves to set the volume, and then connect the output volume of the series of digital control pin to the middle tone contrlol, input pin to the right and the left on the ground.digital volume control complet