Here's an excerpt copied from;
The WELL: Richie Unterberger, White Light / White Heat
The Velvet Underground's second album, "White Light/White Heat," is
the one most notorious for having the kind of "overload" mentioned a
couple posts ago. Basically the group was, on most of the tracks (and
certainly the 17-minute finale "Sister Ray"), cranking their
instruments as loud as they could go. That wasn't as loud as they'd be
today, because the instruments of 1967 weren't as capable of being as
high-volume as today's equipment. But it was still really loud,
probably louder than almost anyone else around, except maybe Jimi
Hendrix and perhaps one or two other acts.
The problem -- though actually I don't think it's a really huge one --
is that while that kind of extreme high volume worked really well in a
concert setting (given the right venue and acoustics), you couldn't
really capture that on tape without it being distorted. Here the VU
were literally pushing the VU meters way into the red, especially on
"Sister Ray." As a consequence, most of the tracks sound distorted
(less polite listeners would say muddy) and don't capture all of the
frequencies you would experience hearing it live in the studio. On
"Sister Ray" itself, the band were recording it one take live in the
studio and literally boosting their own instruments to try and play
louder than anyone else in the band. That's especially evident when
John Cale's organ solo surges to the front with a real whooshing blast.
In retrospect, the band felt they were trying to play with a loud
ferocity that couldn't be captured by the era's technology. In part
because of their experience, they didn't realize there were going to be
serious technical imperfections by playing so loud. The late Sterling
Morrison stated about twenty years later that if you did it then
(mid-1980s), equipment could capture this sonic range without
distortion. He also said they could have worked around this by
recording their parts individually, but much preferred to play live
together, even in a recording situation.
I know this will make some audiophiles and recording professionals,
but really, I don't think the imperfections, if you want to call them
that, matter too much. What all of this *did* help make possible was a
great spontaneous *performance*, which I think is more important than
gaining optimum sonic clarity at the expense of artistic expression. In
particular, the studio version of "Sister Ray" has some of the
greatest high-octane organ playing ever heard on a rock record --
better, in fact, than any other recording with Cale on the organ (and
I've heard a good number, including several unissued live '60s VU
versions of "Sister Ray").