Two questions about WM8804

Hello

I've read the data-sheet and I have tho questions:

1. I can use a external high quality 36.864MHz oscillator as master clock for WM8804 in hardware mode?
2. To allow low jitter recovery of S/PDIF supplied master clocks is better to use the internal oscillator with a crystal or to use a external high quality 36.864MHz oscillator?

Thanks.