Measurements of dacs in car audio dsp with various inputs

[Dumdum]

So I am wanting to have a way to settle my morbid curiosity…

I want to see what usb direct in to a dsp from a pc, pc to topping d10s or Smsl po100 pro and coax into the dsp from the same

The dsp‘s take coax in and optical in… one is 192khz internal rate and the other is 96khz… one has a usb audio input and I also want to measure that input as an output…

Ideally I’d like to measure the output with the same source, being my iPhone… but if I need to use a pc as source and output I can sort that also

Then I want to measure the output of the dsp, they are upto 8v output so I am thinking the cosmos adc as that does upto 10v, however my inputs will be single ended rca so I will make a converter box, but do I need a voltage divider? Is it 10v by balanced xlr and 5v by single ended? Or will it take 10v via single ended also?

I’ve read a few posts about this… they recommended a d10s as a dac and the cosmos as adc…

What software do I need to use to make measurements… will rew do it or is there a better free version?

 

[Dumdum]

This thread mentioned a usb isolator? Is that recommended still if I’m not using single ended out?

Topping D10s + E1DA Cosmos ADC as a measuring system

@pkane : Paul, how would I synchronize REW from 2 PCs? I need REW to make THD and THD+N vs. level and frequency measurements. Don't think you can do sweeps with REW across two instances on different computers, you're right. This should be doable with Multitone, but I'll have to think about it :)

www.audiosciencereview.com

 

[staticV3]

however my inputs will be single ended rca so I will make a converter box

You can hook up RCA sources to the Cosmos ADC with a cable like this:

No external converter required.

Is it 10v by balanced xlr and 5v by single ended? Or will it take 10v via single ended also?

When set to 10V, the Cosmos ADC will take 10Vrms Bal or 10Vrms SE.

What software do I need to use to make measurements… will rew do it or is there a better free version?

REW will do it and it's the best free software for the job.