Fair enough about "live" music. I listened to music on a $100 Sears Silvertone stereo in college and enjoyed it well enough. I am sure there are faults I overlook in my system, although it sounds close to live to me and my friends, who aren't really audiophiles. It's taken me many years to cobble together a good system. A recent inheritance put me at a different level, but it was at best mid-fi most of my life.
I enjoy both Krall and Barber, but I listen to many more female jazz vocalists than that. Cassandra Wilson is one of my favorites. Her album Traveling Miles is exceptional. I also like Morgana King from way back when. I have an album of Teresa Brewer singing with Stephan Grapelli. And then there are the Brazilian singers of which I have more than I can now name.
I'm quite ecletic as you have probably figured out. I've liked the Wayne Shorter I've been playing for the last couple of days, but I broke it up with an interlude of Paul Simon's Rhythm of the Saints.
I'm curious. What else do you listen to but jazz? Classical? Rock? I find elements of jazz in both.