[alsa-devel] opengl 'leaking' sound to input.

I'm trying to record audio from the analog input device of my card, but whenever there seems to be some graphics intensive activity like glxgears, OpenGL assisted window manager, audacity graphs etc... a noise appears in the recording which sounds like some kind of sparking disturbance.

I've recorded audio many times on this box before, but this started to happen suddenly (maybe after an ugprade, but old live CDs with proprietary nvidia drivers installed or newer nouveau drivers seem to have the same issue).

Just to confirm, is this a hardware issue?