This is a process like Dr. Jekyll and Mr. Hyde

Of course all we do here is a hobby, playing around.
I wake up in the morning feeling a great pull towards a separate minidsp dac solution even if it does not seem like a very good solution in terms of performance these old dsp's,
and then in the evening Lyngdorf takes over and its incredible room correction software that come included with free software updates that Paul told me about.
And now you Zola come back to me with THE solution !
I buy a Lyngdorf, l have an offer for a used one I can pick up for 990€, seems like a good price. A stereo active sub is possible with a Y connector for my DIY line Array's that are easy to drive and for a futur open baffle, no problem.
I can also ad to this outlet an amp in case the 2x 60w ohm is a problem with my vintage speakers who do not need any subs.
So now you gave me the solution to learning about all this on the same time as having a good Lyngdorf sound. Great.
Actually I have 5 years ago when my friend sold me his diy line array, a PC set up with a RME Digiface USB and 2 Alientek amps, one for the tweeters, the other for the mediums, so I suppose this was bi amping.
My friend, a high tech student in Toulouse did all the setting up and corrction so I did not learn anything back then but the sound was great with these line arrays even without subs.
The strange thing was that the difference between corrected sound and without correction was very little, at least to my ears. I had my setup in our 5x6m big sleeping room so there was a large bed behind the listener and lots of clothes behind the speakers.
The software my friend used was free. REW, and I think it was rePhase.
Doing like this, Lyngdorf to get going listening to music, thank you Paul,
and my old PC that has only 4 years, a mike that I need anyway for REW, I can now use to learn about all these terms and procedures on the same time.
Is my REM Digiface USB still good for this or if not I can sell it and buy another whatever I need for a PC setup.
So thank you Zola, you just added the missing part of the puzzle !