On droids https://techxplore.com/news/2022-05-star-wars-movies-wrong-androids.html https://www.space.com/star-wars-robots-sci-fi-versus-reality
These robots in this fantasy series are not accurate... ...where's my "what an odd thing to say " gif?
It appears the main articulatable vocal component of an R2 unit in STAR WARS is a simple MIDI synthesizer.
On a related note, what about 3PO and Sith? He says: But 3PO was an off-the-books project by a slave kid on Tattooine, where the Republic had no effective jurisdiction. Why would Ani design his droid to be mechanically incapable of translating Sith?
3PO was built/rebuilt from salvaged parts by Anakin Skywalker as a boy. This means that 3PO's brain is still a regular one build under code by Cybot Galactica sometime before it ended up on Tatooine. Probably salvaged by Jawas from a shipwreck.