So one suggestion from me; who wanted to make very sound effect heavy theme (made after a game menu using said sound assets)
I know from some official themes, very good example being the official splatoon themes that themes can have a custom scroll tick sound (that ticking when scrolling bottom screen) - in splatoon themes for example it is replaced with sloshing effect simulating swimming through ink. Given the cwav chunk possibilities already, that would be last thing missing from this tool as it goes for sound possibilities, before the holy grail of open source CWAV making of course.
So kinda TL;DR: "Screen scroll tick SHOULD be a file you can override with a theme; any possibility for this in future versions"
Thanks a lot for this program, very simple but does what it should and has the needed guidelines as I require no more myself.
Using Yata itself to dump the files from said Splatoon theme I stated as an example; the address for the splatoon theme file is 0x12B3C. The file seems to be few seconds continuous sloshing effect which plays for the time you are scrolling. Edited again as I figured out that all the sound effect addresses vary between themes probably depending on individual cwav sizes.