Mel Gibson tape tampered?

Every day this week has come with a new, expletive-laced rant from Mel Gibson.

Audio expert believes the taped phone conversations may have been altered.

In the latest recording released by RadarOnline, he berates ex-girlfriend Oksana Grigorieva, the mother of their 8-month-old child, for not giving him oral sex and screams that he’ll burn their house down.

"You’re dishonest and you’re f **ked up!," he growled. "So you stay the f **k away from me! Take care of your f **king son and I better have my daughter!"

But is it possible his rants aren’t qutie what they seem?

Grigorieva denied she released the tapes. Now some question their integrity. Forensic audio and video experts examined the recordings for HollywoodLife.com and believe someone tampered with them, editing the audio, removing parts of conversation and piecing together phrases to make the recordings sound real.