"Live" versus "in concert"

[Brian]

I saw this blurb on an upcoming Naxos release (Richard Danielpour). On some nights the music was recorded "live" and on some it was recorded "in concert".

Can someone explain to me the difference?

[kishnevi]

First thought is that "live" is an unedited take;  "in concert" is one that's discreetly edited so you don't hear the trumpet go screechingly flat or sharp just before the climax. 

Alternately,  "live" may mean it was recorded at some sort of rehearsal, although in this case that would mean a rehearsal held during the off day in the actual concert cycle.

Given the terms are associated with different days, I would go for the second possibility in this case.

[Brian]

You got me curious enough to check a 2012 calendar. The "live" day was Saturday and "in concert" was Thursday, Friday, and Sunday. Does it matter if something is an unedited take if you also record on three other days?

[kishnevi]

You got me curious enough to check a 2012 calendar. The "live" day was Saturday and "in concert" was Thursday, Friday, and Sunday. Does it matter if something is an unedited take if you also record on three other days?

The following is said without any knowledge of the actual CD contents--but perhaps different works were recorded on different days;  or one or more works was recorded without blemishes on Saturday;  the other works on the CD were recorded, with edits,  on the other three days.  Of course, this leaves us with the mystery why only Saturday produced the unedited takes and why that day did not contribute to any of the other, edited,  material on the CD.     Which is why I prefer the idea of Saturday being a rehearsal day.   (Is there any way of checking the orchestra's 2012 calendar?)

Two alternative hypotheses: 
Naxos thought it would cool to mess with your head
Naxos is making a test to say if anyone actually pays attention to the recording data.