CVR
Dozy, I suppose I should have said "the flight directors going haywire" (which we all know should have been turned off/ignored. Anyway, someone should confirm if the alerts are/are not hard-wired into Cvr so as to eliminate a potentially major flaw/reason the crew did not acknowledge stall. There was "ozone" smell in cockpit - shame if that were speaker unit and therefore...
Yes, I know it's a long shot, BTW.