Note that Leatrix Sounds is a sound kit browser, not a sound file browser. If you want to find sound IDs so that you can mute sounds, use Leatrix Tunes. Leatrix Tunes is a sound file browser.
Also note that Blizzard removed sound kit names from the game in patch 8.3. So Leatrix Sounds cannot include sound kits that were added to the game after 8.3.
Leatrix Sounds is a complete sound kit browser for World of Warcraft. You can browse, search and play any sound kit in the game including emote sounds, boss sounds, NPC sounds, spell sounds, dialog, music, ambiance and more.
For example, you can search for things like Jaina, Muradin, Ymiron, Lich King, Power Word Shield, Gnome Female, Silly, Zone Forest Day, Forest Scary Night, etc.
Enter /lts to toggle Leatrix Sounds.
Always read the change log when installing updates.
To read the FAQ, click here.
To report a bug, ask for help or leave feedback, use the Issue Tracker.
If you are looking for Leatrix Sounds for Wow Classic, it's here.
If you are looking for a sound file browser, check out Leatrix Tunes.