Hmmm this is somewhat more persoanlly relevant as I got the idea (from somewhat weakish evidence of a tv show) that humans can learn to echolocate and pursued the skill explictly to explore the SIAP I would aquire ie I wanted to know how it feels. While I would in theory be able to work with a computer and pen and paper to answer equivalent objective questions, that kind of route wouldn't provide so much experimental excitement (ie I know already what desk paper work feels like and it is boring).

It's also interesting to note that I could before hand know that my "beforehand" SIAP knowledge was insufficient to answer what I would feel like after. That is I couldn't imagine how it would feel like. That would seem to be pretty close to equivalent to the thought experiment about the color-blind colorperception trained neuroscientist.

in the article the focus seems to be on SIAPs that are directed within the mind. Is "ordinary perception" supposed to be a different beast? Because while my brain didn't receive any additional data (I had the same natural ears) I was in essence able to get a way more vivid phonetic map of my surroundings. It certainly felt like boosting perception of the objective world. I could do stuff like hear shapes around corners (something that you can't do visually (well you can see past a greenhouses corner but it still feels pretty different)).

However if the article tries to argue that SIAP mechanics are somehow a valid "clinging target" I don't think they are any more valid than beliefs. You could try to identify as a person that helds certain beliefs but it doesn't appear as especially right way to identify. From what I got from "organically expanding my SIAP horizont" if somebody made me a quarantee that my uploaded mind would SIAP in the same way I would more likely see that as a lost opportunity. I want a 360 degree vision and a full ball vision could be great and experimenting in trying to see from multiple points of view at once would also be cool experiences I would be drawn to. But given the chance I would like to do the integration myself from the inside rather than doing it as a outside job (ie vanilla copy as the playroom start point is fine and cool).

I guess also that would be somewhat sad if the echolocation would be lost on the translation. But it feels that it would not be that big of a deal to rebuild it.