I do not think that Andlid was far off when he said exhaust manifold gasket.
Loose spark plug would also give a similar noise.
Impossible to give an informed diagnoses off a sound track.
Peeps on here, including myself, are only giving you there thoughts, which usually always leads to confusion.
Any half decent technician should be able to diagnose this if the car was in front of him.
I had to replace a manifold gasket on mine recently and it is no fun job.
Alex.