ARP 4012
The record for the ARP 4012 is thin, and it is contaminated. The only manufacturer-document excerpts our archive holds under this model number are not for a synthesizer. They are the multilingual owner's manual for a Royal Sovereign portable air conditioner - a 12,000 BTU/hr, 115V 60Hz window-vented unit drawing 1,700W and 14.8A on R-22 refrigerant, sold in ARP-4009, ARP-4010, ARP-4012 and ARP-4012H variants. That is a real product with a real manual, and it shares the string "ARP-4012" with the synthesizer module. It is not our subject, and none of its specifications belong on this page. This note is here so the next person searching "ARP 4012 manual" understands why the results look the way they do.
One period reference survives on the synthesizer side. Sound On Sound (December 1997, p.265), writing about the ARP Odyssey's tuning stability, remarked that a well-maintained unit would hold near-perfect pitch in everything from hot clubs to freezing outdoor stages. That is a note about the Odyssey as a whole, not the 4012 specifically. It is the only magazine citation our corpus contains under this model number. The second chunk is a reader's-letter column with no bearing on the module. Beyond that, the archive has no verified fact sheet, no service documentation, and no confirmed production dates for the 4012 as a discrete part.
The ARP 4012 is a real designation that turns up in ARP synthesizer circles, but our sourced record of it is close to empty. We will not fill that gap with recollection dressed up as research. If you have documentation - a service manual, a parts list, a period review that names the 4012 explicitly - we would like to see it. Until then, we would rather publish three verified sentences than a confident paragraph we cannot stand behind.
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