I've been on SL for a hot minute (almost thirteen years here) and I've done my fair share of uploading, both in textures and in sounds. In relevant past, I've completely swapped sounds in a HUD to match a different creature entirely, using over 20 sounds, file by file, and it's worked perfectly.
NOW, for some reason, it's refusing to upload my .wav files entirely. I am most certainly exporting them as .wav files, set to 44.1 sampling, nothing over seven seconds of playtime, set to signed 16-bit PCM, and it's giving me... This crap.
When my sample is just sitting here like...
Just... Help me out here. I've been doing this for years, what's changed that I'm unaware of?