fuckin' AI search results man
search "slowest mahler 6"
result of AI overview says "The slowest recorded version of Mahler's Symphony No. 6 is generally attributed to Harold Farberman. His 1980s recording for Vox was noted for its unusually slow tempos. Farberman's interpretation is characterized by a focus on the music's delicate beauties and emotional depths, leading to some of the slowest recordings available"
ok, let's find out
search up Farberman's Mahler 6, see a review on classicstoday
first paragraph: "Harold Farberman’s Mahler Sixth was the most successful of the clutch of Mahler symphonies he recorded for Vox in the 1980s (the others were 1, 2, 4, and 5). Claiming that Mahler was generally “played too fast”, Farberman determined to set things right by leading some of the slowest performances on disc. Thankfully he did not hold this opinion about Symphony No. 6, as he leads a strongly vibrant performance with good, generally upbeat tempos in all four movements."
-_-
Granted, it's still 88 minutes long so it's still slightly slower than most, but we're talking like 5-9 minutes longer, not quite what I was looking for. Yes, I realize as I finish typing this up the AI was technically correct, but surely there's got to be slower!