"I was embarrassed. I woke up the next morning to people in England being like, 'We still love you, don't worry.'
"And I said, 'I didn't ask if you still loved me, but thanks."'
"I'm always a bit pitchy anyways," she said to laughter. "It's emotion. When I'm flat and I'm sharp, I'm just emotional."
Adele previously made light of the incident on Twitter, saying she had taken solace by having a burger.
She also had a beer, she volunteered in the interview.
The organisation behind the Grammys admitted it was at fault over the snafu, which led to the sound going out momentarily.
"If it wasn't live TV I would have busted a joke. But because it was TV, I couldn't make it my own. I couldn't make the disaster my own," Adele said.
When the microphone fell, viewers heard what sounded like an out-of-the-blue guitar lick in Adele's heartbreak ballad All I Ask.
Adele exonerated Justin Bieber after some social media users alleged that the Canadian pop celebrity - who played and smashed a guitar at the Grammys - had been rehearsing.
- AFP