<Preset> - Contains the entire list of settings as well as Details about the precut being used:

Data Fields:

Company - Typically Audient but allows for any future sub brands
Product - Lists the Product being used, EVO 8 for example
Schema-version - The version number of the State.xml layout.
Software Version - The version number of the EVO mixer software. 

<Device> - Contains all the settings which impact the Device directly 

<Mixer> - Settings relating to the Mixer software

Data Fields:

artistMixEnabled - Can be either 0 or 1 to disable or enable the artist mix, which allows for separate audio to be sent to outputs 3+4. 

<Input> - Settings relating to one of the channels in the EVO mixer

Data Fields: 

Input channel - channel number, starts at zero and counts upwards
Mode - 0 is Mono, 1 Is stereo and 2 is not currently shown
Name - The given name of the channel (Mic 1 for example)
Cut - either 0 or 1 to disable or enable Cut

<Mix> - Settings relating to a Mixer Channel

Data Fields: 

Index - 0 is the Main Mix settings, 1 is the Artist mix settings when enabled
Volume - Level of audio being sent to a mix, Can be set between -128 and 10.
Pan - Panning of the audio being sent to a mix, can be set between 0 and 1 with 0.5 being centre pan. 

<Output> - Settings related to the Outputs of the Device 

Data Fields:

Channel - The channel number starting from 0 upwards
Volume - The output volume of this output. This can be set between -128 and 0. 
Name - The given name of the output, Output 1+2 for example

<System> - Controls that affect the hardware on the unit such as the pre-amps

<Inputs> Different to <input>, these are settings relating to the hardware controls.

Data Fields:

Index - the channel number counting from 0 upwards. 
Phantom - can be set to either 0 or 1 to disable or enable phantom power on an input
Gain - The gain level of the channel, can be set between 0 and 12800
Mute - can be set to either 0 or 1 to disable or enable the Mute on this input
Link - can be set to either 0 or 1 disable or enable stereo linking on this channel. Available pairs are channels 1+2 or channels 3+4. Both flags must be set to 1 in order to link channels. 

<Routing> - Settings relating to audio routing on the Host PC

<Loop-back> - Settings relating to Loopback

Data Fields:

Type - Can be set between 0 and 4 to choose the loopback audio source

0 - Output 1+2
1 - Output 3+4
2 - Loopback 1+2
3 - Main Mix
4 - Artist Mix

Index - The channel number of the loopback from 0 upwards.

<Gui> - Settings related to the graphical User Interface

Data Fields: 

Gui-type - Can be set to Modern, Classic or EBVO depending on the product being used
Show-product-reg - Can be set to 0 or 1 to show or hide the registration screen on start up

<Window> - Settings relating to the Mixer Windows.

Data Fields:

Id - The id of the windows shown. 0 is the Mixer window, 1 is the Settings panel used for the iD settings
Window Open - Can be set to 0 or 1 to show or hide the window. 

<State> - Settings Relating to the state of the mixer. 

Data Fields:

analogue-inputs-visible - Sets if the analog inputs are shown in the mixer. Can be set to 0 or 1
digital-inputs-visible - Sets if the digital inputs are shown in the mixer (where applicable). Can be set to 0 or 1
daw-inputs-visible - Sets if the Daw Channels inputs are shown in the mixer can be set to 0 or 1
input-controls-visible - Sets if the Gain and Phantom power settings are shown in the mixer. Can be set to 0 or 1
window-pos-x - Sets the X postion of the mixer on screen based on Pixels
window-pos-y - Sets the Y postion of the mixer on screen based on Pixels