music sync ios 9 imp. CDs Pc Ipad

Hi there!
I am using the ipad air for home entertainment, practicing guitar, recording and forming ideas in garageband.
I am online only via Wlan, using a ftitzbox 7490, 2 airport express to fit 2 Hifi systems, and 1 apple tv...
Home entertainment means to me being independent from any cloud online whatever service.
I import my CDs on Pc to itunes, and synchronized the music I wanted on my pad.

The audio comfort I got was great, and my Cds are save.

The Question:How Do I make this possible again? Now I can only select "synchrizing speech memo..." or similar, but not the music from my itunes library.

Hope to find an answer, thanks for reading,
Carsten