This is an interesting choice for von Otter, now 53. She has always been an extremely versatile singer, at home in Monteverdi or Mahler. But the voice is no longer as even and fresh as in earlier years, and the flexibility needed for Bach's long line, with its demand for ornamentation, isn't always there. Von Otter has tirumphed in Handel, though, and I expected her to treat these arias from an assortment of cantatas as well as the St. Matthew Passion, Magnificat, and B minor Mass, as opera. Instead, she's almost uniformly gentle; in fact, she barely raises her voice.
Miked very close, she doesn't have to worry about breath control or volume. Even though her vocal production isn't perfect (not that I even want mechanical perfection), von Otter possesses such artistry that she more than holds her own. The accompaniments from the Baroque Concerto Copenhagen are discreet, elegant, and of course in up-to-date period style. If you go back to classic Bach recordings from Janet Baker, you'll hear more panache and attack in the orchestral parts, and Lorraine Hunt Lieberson turns this music into a much more moving experience emotionally -- von Otter almost completely avoids reverence, to her detriment, I think. Instead, she's as elegant and pointed as the chirping oboe d'amore and recorder behind her. (A cry from the soul like "Erbarme dich" becomes a languidly melancholy refrain.)
For me, Bach performances without religious fervor miss half of what Bach's art is about. But we are well into the era of dry, pointed phrasing and detached emotions in Bach styling, so I msut acknowledge that von Otter carries it off as well as any. Let British critics gush and "Unhelpfuls" rain from the sky.