spiral wrote:There is a picture of Jarre studio from January 1978 showing an ARP2600 with a moog-ladder filter.
He also had an orange one later on (with a new apr filter) though I'm not sure when he got that one.
But at the time of recording of Equinoxe, he indeed did have a moog-filter ARP
The picture below from 1976 shows Jarre with an early Gray Face Tonus Logo Arp 2600 (it looks like a rev 2 to me because the casing of the rev 1 was slightly smaller).
Speaking of the so-called "Moog-ladder" filter (4012); 2600's with this filter were actually more common than most people would like to think. In fact, it was used in all 2600's made from early 1971 to late 1976. There were of course other changes made to the Arp 2600 during that period, both internal and external but that's another story.
A very young Jarre in the studio. This shot was probably taken around the time Oxygene was recorded in the fall of '76,