Ey, this was a genuinely awesome experience from head-to-toe! I've got a whole series that I plan on releasing during these next few weeks starting today, if you'd like to keep up with that. For anyone who's interested in reading my feedback, expect some spoilers, of course.
Overall, my opinion rests that SoUnd Is ToxIc is one of the best visual novel games I've played in a while. The only few knit-picks I'll jab at ya is that I wish tweaking game files directly had more of a role, if at all, within this game so the outcome felt more meaningful and impactful than it already does. Additionally, I suppose having no voices other than Lolite's at the very end served its purpose, but I think the game could've used just a bit of voice acting scattered here and there, excluding the muffled noises of the audio files from calling victims. A prime spot for this could've been right before you discover Blue's dead corpse in that very creepy sequence; it would've come a s a surprise if done correctly because there really hasn't been any sort of clear voice speaking directly to the player.
Here's to hoping that my feedback was helpful, and that you all keep up to date on my gameplay for the series. Have a lovely day, folks.