Hello Detlof! At least twice a week, as I sing in a church choir and we have a rehearsal and performance every week, and I listen to our organist's postlude. As far as attending concerts and other musical events, I attend at least two or three a month, sometimes more. NYC area is a great one for musical offerings.
How often do you listen to live music?
I feel that the constant tuning of our ears to a live musical event, no matter what kind of music ( except perhaps to heavy metal at close quarters for health reasons) is essential for an audiophile to rightly assess his and other systems. I myself try to go to a concert at least three to four times a month. How about my fellow audiophiles out there? And especially how about our panel of experts? Albert, Sean et al ??