I am working on designing an op-amp audio amplifier with digital audio level control and using the project http://fritzing.org/projects/op-amp-audio-amplifier as my template. The template shows that the audio jack for audio in the left channel is connected to the output of that Op-amp, whose positive input comes from the high end of the Pot (using DS1809), and the right channel in goes to + of the other Op-Amp and it’s output going into the low end of the pot, and the wiper going to the speaker.
Why is the left plugged into an Op-Amp output and why connect anything to the high end of the pot?
I attached an organized version of the above link with the digital pot but before I add the bandpass filter.
Audio Amplifier Align.fzz (27.7 KB)
