Michael Jackson was known for his soft and high-pitched voice, but a resurfaced video suggests he might have just being putting it on.

The ‘Thriller’ singer’s softly spoken voice was just as much part of his image as the moonwalk and his glitter glove.

Rumours circulated that the reason for his high-pitched tone was because of his notoriously strange father injecting him with hormones to stay childlike forever, maintaining his tone for singing.

Conrad Murray, the doctor who served time for administering Jackson a fatal dose of painkillers, claims the singer’s late father Joe Jackson chemically castrated him aged 12 to ‘maintain his high-pitched voice’.

While it is uncertain whether this actually happened, the people closest to Michael have instead claimed his voice was part of a carefully crafted public persona.

Rapper T-Pain once recalled: “His voice is as deep as s**t.

“It was between where you think Michael Jackson is and Prince.

“It was inbetween that.”

Michael Jackson’s allegedly had a deep speaking voice. Credit: Youtube/The Detail

There is also a clip of Michael using a deeper, more masculine voice during a performance in Copenhagen in 1997.

One fan commented under the video: “Wow, makes him seem like a totally different person in that moment.”

The megastar’s good friends Liza Minnelli and David Gest once let slip that the star had a second voice.

Liza was shocked when she first heard his deep tone, and said: “Michael, you’re busted.

“All these years you’ve been talking in that voice.”

In 2005, journalist Diane Dimond said Jackson had a ‘big, deep voice’.

She said: “Somewhere in there, especially if you bring him bad news or if you make him mad, his voice gets very, very deep.

“I was there one day when someone asked him about Gloria Allred, the attorney that has sort of dogged him and turned around in one foul swoop and said ‘She can go to hell’ in this big, deep masculine voice.”

“He’s been hurt too much” says Liza Minelli.

David and Liza believed that Michael had crafted a public persona, which the high-pitched voice was a part of, to protect his inner and younger self after years of pain and hurt.

Liza added: “He’s been hurt too much.

“I mean, people have said kind of rotten things about him.

“The person that we know is a rather regular guy, believe it or not.”