Rough shaking in Idle, but fine when accelerating

[Mr_Peaches]

SO when I turn on the car, it`s idling really roughly, it will start off at close to 1000 and the it will drop to the normal 700ish. But it`s got a lot of vibrations.

Pushing the clutch doesn`t change it at all, but if you start accelerating the vibration disapear, but then when you stay at a steady speed there is a smaller vibration (more of a knocking since it`s so spaced out)

A garage thinks it might be the AC compressor but I don`t think so. THe sound seems to originate close to it.