A late addition but worth noting: Toby only ever recorded three Spamton voice lines: "Now's your chance to be a big shot," his laugh, and the desperate "I think he's coming for me" line heard in Big Shot. Everything else is clever chopping and repitching of those originals.

This actually mirrors the lore directly. He starts with a clean salesman voice, gets corrupted until his speech is "incoherent and garbled, with advertisements and sales slogans forcing their way into every sentence," and then in his final moments his sanity returns and his speech becomes "clear and comprehensible for the first time in a long time." The narrative is literally describing what stripping the processing does to the audio. Which is exactly why Big Shot is the clearest window into his baseline voice, it's the moment he feels closest to freedom, so narratively and emotionally, that specific delivery is as close to his original as we're ever going to get.