The only difference you are trying to do is that I see in usb otg.gif is a box listed as "fuel gauge".
Is this for car audio? I am sure there are similar chinese products that have this concept
maybe cheaper and less complicated to save costs.
It is amusing that you come here to ask for opinions about something like audio as you have pointed out
like cpu OSs.Talking about them is like religion and you want to avoid that.
Still it's not strange
if you are an engineer asking in an engineering/hobbyist forum.
The question most relavant to your success is who are your target users/customers.How much are they
willing to pay for your ground breaking product this being a
"high performance audio".I like to point out a common assumption that engineers assume in audio that if it 's got sound it then passes the test and therefore ready to go to market after verifying the specifications.
The thing engineers must come to a realisation that, does designing for test instruments that replace the
human ear showing low distortion, low this and that etc. equate to what a human would find listenable
or musical? Oh I'll bet you will say this is audiophools territory.
What matters is the test results measured. Can test equipment replace the human ear and for that the ear is connected to the human via brain and other senses. Can test equipment really take all these into account?
In the end you must ask yourself who you are designing for, test equipment or human beings.Engineers must sort this out if they are to make any significant progress towards audio as many derogatorily say it's only 20 - 20Khz. What's so difficult about it?
As an aside, there are many ways or methods to tune a musical instrument for tonality but ultimately this instrument must harmonise with the other musical instruments to create an enjoyable musical experience.
I wish you success all the same.