About which Moog model are you talking?
And apparently you are not a native english speaker (me neither). Some things like “Now the brass tax” does not make sense to me.
When orborneroberts writes “Now the brass tax” he might intend the English idiom “get down to brass tacks” which means “let’s discuss the most important question or essential information.”
As for “none showing detailed knobs for the sound”, try looking at the owner’s manual. The manuals for current (and many legacy) Moog instruments are available on the Moog Music website. Just click on the “Synthesizer” menu. Moog Music manuals are usually well-written and explain what every knob does, along with much more helpful information.