DSP amp, will my schematic work?

[Michaelaudio]

So this is my DSP amp i designed, mostly from the typical applications in the datasheets, but maybe i missed something.

Im not 100% shure about the DIR9001 Part, since im a noob in digital things, will it work like this?

The Attiny in the Power/controll section is for switching 5V and 24V Off, when no music is playing for 15minutes. I plan on using the ADCs of it, to sense the audio signal from the Input of the DSP, via the 2 diodes, is it reliable to do it like that?
I will get help with the programming of the Attiny.

As for the rest, if something is wrong, im happy to know it.

[jwet]

There is a problem with your input muxing and detector circuit I think- there is no DC path to center the signal though the switch.  Your input is AC coupled comes though a the amps, is AC coupled to the MUX which is run on 15 and ground.  It doesn't have any DC bias.  You need to have some kind of baseline restorer somewhere.  As it is I think, think the DC level will fall in a diode drop below the AT Tiny power supply.  Also, you might want to put a series resistor and maybe a low pass in the diode sense path. Any digital noise on the AT tiny input will get coupled directly into the audio path through the diode capacitance.  Slow this down and isolate it in some way.  You also want some resistance in this path so you don't latch up the AT Tiny on big audio swings.  It looks good at a first cut at a board.  I think I would breadboard up your input and AT tiny stuff and look at swings   

[Michaelaudio]

Oh yes, i totally missed that. Can i just bias the VDD of the CD4052 with 7,5V? It may work but im not really sure.

Eddit: i did some thinking, this wont work i guess. I'll just leave the caps of the op outputs away, and bias the BT Signals. That will work for sure and the caps in the DSP Inputs should be enough.

Yea, the diodes were stupid, i wanna sense even a verry low audio signal, so i did it for the left and right Channel, as shown in the picture.