Board Mix?

[nitrus]

I'd really like to know what exactly a 'board mix' means... What is the difference between Roundabout and the rest of the concert in this?

[Hed G.]

A "board mix" recording is a stereo recording made directly from the output of
the P.A. mixing desk, without ambience microphone sources (usually placed above
the audience) or correctional overdubs, done in the studio in the aftermath.
The rest of the concert was recorded to multi-track tape and mixed very much like
a studio album (most official live recordings are done this way).

[nitrus]

Oh, I see. Thanks really much, you helped me a lot!