Issues Uploading .wav Sound Files

[Doctor Adagio]

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?

[animats]

Mono.

[sandi Mexicola]

8 minutes ago, animats said:

Mono.

good catch!  👍

[Doctor Adagio]

11 minutes ago, animats said:

Mono.

Oddly enough, that didn't do it.  For some reason, however, I had to go in and manually set each sample by hand, despite the option in the dropdown menu and the save function.  Luckily, that was enough to do it...  It worked, and for some reason it's a new step on my end, but it ended up working and I got all my sounds uploaded.

Thank you for responding anyway.  I appreciate the help, even if I did end up figuring it out on my own. lol