He can't pick out favourite conductors from back then, as it was the music that caught his imagination.
"I was struck by its scale of expression and the unbelievable range of colours, even if sometimes the music itself wasn't really so great."
Thursday's APO programme is dominated by the Second Symphony of Sibelius, a composer not frequently encountered in the concert halls of Ashkenazy's youth. In fact, he was introduced to this music by his Icelandic wife, Thorunn, just before they married.
"She had come to study in Russia and, being very fond of Sibelius, played me a tape of this Second Symphony," he recalls. "I'd never heard it before but I was very impressed. I went on to find recordings of other works, such as the Fifth Symphony and the Violin Concerto."
Ashkenazy would eventually record the complete symphonies in the late 70s and early 80s in performances that had one critic recommending them for punters who like their Sibelius "to blaze and sparkle, with a bass that could turn molybdenum to dust".
Yet, he has described these works as music indelibly linked with a Finnish landscape and mindset. In a television documentary last year, he was quick to point out this influence was far from a superficial one; Sibelius' conception of nature was what we are and what surrounds us, what's in our very hearts and minds.
The Finnish composer develops this into his own idiom, Ashkenazy explains. "And it draws on a tremendous potential, because nature is not just lyrical and gorgeous - there are thunderstorms, oceans and heaven knows what - and he catches all of that in his music."
Finally, he's determined to tell me a story and it's a true one, I'm assured, describing Sibelius coming out of his house and being overcome by a vision of circling birds and wonderful blue skies.
"He quickly went back inside and started to work on his Fifth Symphony," he laughs. "It's a touching story, that one, and very significant."
What: Ashkenazy, Auckland Philharmonia Orchestra
Where & when: Auckland Town Hall, Thursday at 8pm