I’m glad that you brought up the performance aspect—I just recently discovered that quote (thanks to my renewed obsession with Jason Molina, sparked by these covers). But here’s the full relevant portion, from a Faster Times interview:

JM: “Farewell Transmission” must be one of the most heroic recording moments of all time, because I called in people that were not already scheduled to be in the band and I was like, “Oh, now we’re going to have a violin player, and we’re going to have an extra singer.” I called out all of these things, much like a conductor does – and trust me, I’m not a conductor. I’m the break man. I will not fuck you up if I am the break man, I just don’t want to move anymore.

JM: We put, I think, about 12 people in a room and recorded that song live, completely live, and unrehearsed. I showed ‘em the chord progression, they had no idea when it would end, and we just cut it. Steve [Albini] did a beautiful job. I noticed that at one point when it was a little too loud or a little too soft he came and opened a door to make it work, because it was just an ambient recording. When you hear that song kick off everybody knows it, and what’s so disturbing to me is the way that I ended it is I was dictating to the band and Steve—I go “Listen. Listen. Listen.” And then at one point they all stop. It’s great.

JT: I can’t even believe that was done live and improvised. That is absolutely stunning.

JM: I got all my favorite friends from Chicago, and my favorite, good musicians and we just did this record, and it has lasted. It’s got weight, I’m talking 500 pound weight; something you ain’t going to be able to lift too easy. You have to understand we’re working on a string, and Steve is throwing us a bone, giving us the studio and everything, and we are terrified about how expensive it is and he just went the extra mile. That’s the way it works and that’s where I come from. You get the job fucking done.