[spookthesunset]

Correct me if I’m wrong but isn’t the activation word “special” in that it has to work in very low power states? I always assumed that is why the wake words are fixed, because said words need to “fit” within a very small power budget.

[ben_w]

Could be — I've heard rumours along those lines, but none came with evidence.

[skygazer]

https://machinelearning.apple.com/research/hey-siri (2017)

The rumors were true.