How often should you re-calibrate your ears?

I went to see a jazz quartet last night in an intimate setting. It had been waay too long since I've been out to experience live music. Sitting at home listening to music and critiquing the accuracy of the recording is really worthless if you don't periodically experience a true reference...... a live event.

The experience provided me with some sorely needed perspective. I am now of the belief that twice a year is the minimun those in this hobby should experienc a live musical event of the type of music you listen to on recordings.

I now know I have been far too dependent on recorded music for too long. Live is still where it's at.