Grumpy_Mike:
Two things.
What is the "sound sensor"? Normally things called a sound sensor are just an envelope detector and you do not get any wave information from them so they can't be used to record a sound.
That second diagram is the way to go but do not put that capacitor to ground on the potential divider because that just shorts out your signal.
Sound sensor works as temporary, i can have an analog sound wave that works temporarily great.
Have you tested that source code that i have there (i got it from one of your posts here in the forum i believe), there's a lot of noising coming out of it (i tested that source out with an AMP and a microphone, also with an audio in)