process of using audio core through nios ii

Hi everyone,

I am learning how to use Nios ii to design a play back system by using DE2-115 board for now. The final result should be the same as this laboratory. ftp://ftp.altera.com/up/pub/altera_material/laboratory_exercises/computer_organization/de2/lab8.pdf

Here is the design, Does anyone can help me to check the design is correct or not? Do I miss any components of my design in Qsys?

http://www.alteraforum.com/forum/attachment.php?attachmentid=11865&stc=1

http://i.imgur.com/lwmhups.png

Another problem is that I don't know how to implement the next step... Does anyone can guide me for the next step?:(

I already follow the tutorial which is provided by altera...ftp://ftp.altera.com/up/pub/altera_material/12.1/tutorials/introduction_to_the_altera_qsys_tool.pdf

But still no idea...

Hope someone can ask my question.:)

Many Thanks!