According to the liner notes from the Mosaic box, the problems with the "Meet Me At The Jazz Corner Of The World" tapes are baked in:
Although all of the sessions in this collection were recorded by the extraordinary Rudy Van Gelder, there are sonic problems on two sessions.
The drums were recorded very ‘hot’ on the March 14, 1961 session and sound at times on the threshold of distortion. On the live Birdland date, there is a vibrating, fluttering distortion that takes place intermittently in the horns and sometimes the entire ensemble.
These problems exist on the original master tapes. They have been corrected as much as possible, but are still aurally present.