I was hoping I could get help with a design I have breadboarded/diagrammed with regards to a low level signal still present when I have my volume pot turned all the way down. When I turn my volume control down all the way there is a low volume/high treble sputtering distortion signal that's still audible. I thought is was a grounding issue on my volume pot but it's not coming from there, not exactly sure where it's coming from. I hope I tagged this correctly as I'm still learning proper terms.
You need to reduce R11 to zero if you expect the volume to go to zero.
If you are hearing distortion, the output may be clipped. Since they put the volume control after the amp, this is a possibility. Do you have a scope?
I don't care for this design. LM386 are designed to drive speakers, so although they will work, they are not the best choice. The output impedance is variable, it depends on the volume setting.