Houstoun pondered Rachmaninov's ingenious harmonisations of the second movement's pithy theme, taking time out to roar magnificently against an orchestral rush, ending with an explosion of colour and vitality. After interval came the Shostakovich symphony that had given the concert its title.
So popular was the Leningrad Symphony in its time that its American premiere put Shostakovich on the cover of Time. Critic Olin Downes later dismissed the score as "excellent musical propaganda but a second-class symphony" - not a description which bore any resemblance to Vasily Petrenko's vision.
The Russian conductor launched the 70-minute symphonic saga with fervent full-power strings, working it through to something of a socialist Bolero.
Petrenko kept the pressure on, driving his musicians ever forward until release came in clearer tonal skies and exquisite solos.
Mahlerian connections were forged in the single-minded Landler of the second movement, while the Finale, after pages of profound reflection, ended with a massive, thrilling shout, not so much a wartime rally, but a cry for freedom that still has relevance today.
What: New Zealand Symphony Orchestra
Where: Auckland Town Hall
When: Saturday