Early in 2001, in their "50 Great Recordings" series, Philips reissued the 1958 Sofia recital by Sviatoslav Richter. You may also acquire the recital in the 2 CD "Great Pianists of the Century" series where it is in tandem with Richter playing Prokofiev piano sonatas. I have neither heard that latter release nor ever heard any issue of this Sofia recital before, so I listened to it with "fresh ears".
Reviews here and elsewhere warned me that the sound was barely tolerable, and that audience coughing was too intrusive. Well, I can report that, once the "Pictures" begin, poor sound quality is forgotten. This is a riveting performance. The piano's dynamic range is well enough suggested, the recording quality is better in the other items, and I was not disturbed by any audible background hum. To those who complain about audience coughs I say: firstly, attend more concerts yourself and become accustomed to this phenomenon and, secondly, regard such sounds as reminders of a live performance before a large audience.
No one is likely to attend any live performance as brilliant as this.