Playing back slowed down!! Help!!

Hello, really hoping someone will now the answer to this! I record a news bulletin from home every week and until last week the recording was perfectly good. However when I came to record last Monday I played back too slowly. I haven’t changed anything. I’ve tried re-downloading Audacity but that didn’t help. What could be the cause? Soundcard in my laptop? I record using a Presonsus USB interface and a Rode NT1 mic. Please help before I chuck the whole out of the window :blush:

It’s probably due to mismatched sample rates. If so, then we should be able to correct it.

What were you playing back, the Audacity project, or an exported audio file?