From QP today:

Mr. Pierre Poilievre (Parliamentary Secretary to the Prime Minister and to the Minister of Intergovernmental Affairs, CPC): Mr. Speaker, it is clear, in fact, that the tape was tampered. The matter is now settled and both parties are pleased with that settlement.

From Stephen Harper’s audio expert:

A tape recording at the centre of Prime Minister Stephen Harper’s $3.5-million defamation suit against the Liberal party was not altered as the prime minister has claimed, a court-ordered analysis of the tape by Harper’s own audio expert has found.

The key portion of the recorded interview of Harper by a B.C. journalist contains no splices, edits or alterations, a U.S. forensic audio expert has determined.

It’s not that I don’t believe Pierre Polievre, but I’d be a lot more inclined to accept team Harper’s talking points if the Tory MP making these claims was an expert in the field of tape-doctoring like, say, Gurmant Grewal.