Edward Richtofen is the German scientist from Treyarch's Call of Duty Zombies storyline, first appearing in World at War in 2008 and becoming one of the mode's most quoted characters. Caro diario is Italian for dear diary, and the nota vocale description points to how this version circulated in Italian-speaking gaming communities as a short voice-note style joke. Fans repost impressions and edits of Richtofen in mundane formats because his grandiose delivery makes even a simple diary greeting sound like a secret experiment log.
About this sound
Short Richtofen voice note clip saying Caro Diario, from Call of Duty Zombies fandom, used as a funny diary entry intro in gaming edits and memes.
This is a very short voice clip built around Richtofen saying Caro Diario like the opening of a personal diary entry. Delivered in a dramatic, theatrical tone in just over a second and a half, it feels less like a normal game line and more like a mock-serious voice note. The contrast between the infamous Call of Duty Zombies scientist and the intimate dear diary format is what makes it funny. Dropped without context, it instantly frames whatever follows as a confession, a rant, or an overly important secret about to be revealed.