Lorin Maazel's approach to Mahler is quixotic – he describes the symphonies as "like spaceships, forever orbiting and sending out signals", which may sound spaced-out, but his Mahler is a cosmic experience, writes Alfred Hickling
Vasily Petrenko's ranting, brutal interpretation of Mahler's Sixth was a high point of the Liverpool Philharmonic's anniversary cycle, writes Tim Ashley