What product is the best solution for my idea?

Hi there, My name is Toby Mulder a 26 year old student at the University of Utrecht in the Netherlands and I'm Just new on this forum!

I have a question about selecting the best solution for my idea.

For my Thesis I'm designing my own Eurorack Audio mixer/interface module (check pdf image for a visual prototype) and I'm looking for the best solution to do the following:

I want to create a Dj-style Audio mixer with atleast:

• 8 Analog audio IN's (probably mono)
• 2 Direct Outs (for Speakers)
• USB connection for Digital Audio interfacing
• 8 Digital Audio Outs via USB (the 8 ADC channels need to be converted to 8 separate DAC channels)
• (optional) 1 Midi in
• (optional) 1 Midi out

I want to build a working prototype before i start designing my own pcb, so i'm looking for the easiest and most compatible option out there.

I've been browsing around some evaluation board for different IC's but there are so many options that i wouldn't know what the best option is.

These are some of the boards/IC's i found that i think are a good option. 

https://www.analog.com/en/products/ad7768.html?doc=AD7768-7768-4.pdf#product-overview

https://www.analog.com/en/products/ad5592r.html

https://www.analog.com/en/ad7294-2

So if you have a suggestion for a better board/circuit or IC please let me know!

Looking forward to your replies,

Kind regards,

Toby