Looks reasonable, except for the SRC:

Using the SRC at the input defeats the much better jitter removal of FS Clock, as the input’s jitter will be printed into the audio stream by the SRC chip.
Better without SRC.

To consider:
• I prefer DAC mode, it’s even easier to use.

• For case (4) be sure there is a valid SINGLE clock master, e.g. Master Digiface USB, Slave ADI-2 clocked through it’s optical in.
ADI-2 clock slave does NOT work in the simplistic DAC mode, so AD-DA mode for this.

You can store Setups for each use case and recall them on the remote.
.

Yes, but even better:
An individual button assignment is stored within each Setup.

So, with one single button you can circle through numerous Setups, like:

Same button recalls:
Setup 2 (from Setup 1)
Setup 3 (from Setup 2)
Setup 4 (from Setup 3)
Setup 1 (from Setup 4)

Maybe 2 Setups are enough anyway, as there are dedicated Coax/Optical input select buttons on the remote and 1 Source Analog, 2 Source AES are default button assignments (manual page 18).

Yes, if you skip Digiface USB, and ADI-2 Pro’s USB comes into play, the Master Clock for (4) is solved too, the host sets the clock.

I this case you don’t even need Setups, just select the inputs at the remote.

I like and use DAC Mode for it’s simplicity, in a comparable config:

• Streaming and recording through USB (on an iDevice).
• External sources (CD-Player, TV, etc.) from a digital switchbox into ADI-2 Pro’s optical in.
• Analog sources.
I don‘t need multiple parallel routings like possible in other Modes, listening one source at a time.

Then DAC Mode is not well suited for case (4), as you can‘t properly control the sample rate.

When switching to Analog Input ADI-2 Pro continues to run on the last used SR, without a user option to change that.

@MC: could this be changed? Makes no sense to grey out the SR option in this case.

A parallel connection of ADI-2 Pro AND Digiface USB via USB would be counterintuitive in the sense of simplicity.
Then better use ADDA Mode for case (4), selected by a Preset.

One more question.

Say I have a source that has both a SPDIF optical out as well as an AES digital out. I currently have connected it via optical. Now with a ADI-2 in sight I could also use AES. Any preference or does it not matter in terms of sound quality?
It's only for CD quality e.g. 16bit 44.1kHz

> FS
Steadyclock (FS).

Super, about to start experimenting now.

By the way I noted the ADI-2 is upon button presses of programmable buttons 1-7 complaining that different sources can only be selected via this buttons in DAC mode.

As I don’t have a Digiface USB, I can’t test these scenarios.

Remember:
There needs to be a single clock master, other devices need to be slaved, and may NOT free run.

(D) looks valid, except that Digiface USB unit can’t be master AND slave at the same time.
If Digiface USB is dedicated clock master, getting it’s same clocked signal back on it’s input doesn’t partly turn it into a slave.

Check ADI-2’s State Overview screen to verify ADI-2 is slave:
SP op: “sync” and Clock Source is “SPDIF”.

(A) I can’t follow.

Complex clock configurations are best verified by recording a high frequency sinewave (above audible) from an external analog source, e.g. a smartphone generator app.

When there are clock issues, audible clicks due to jumping samples appear.
The Digicheck Analyser can show them too, the lower f-bands act when clicks happen.
Don’t play it loud (don’t need to, the clicks are obvious), such signals can kill tweeters.

and I route every thing thru Digiface because I want to control all mixes via the computer

The main point for analog recording is:
ADI-2 needs to be Clock Slave to Digiface USB‘s optical out.

In AD/DA Mode this can be configured.
Then check State Ocerview screen to verify ADI-2 is slave:
SP op: “sync” and Clock Source is “SPDIF”.

That‘s it.

This does not work in DAC mode BTW.

Good idea! Link to digital optical / coax switches see below link from MC.