Soundboard

Easiest: start Smart Nexus in your voice channel with /smartnexus, then switch on Play in Discord via Nexus above. Any sound, any length (up to 30 seconds), no soundboard slots needed. The volume slider sets how loud it plays in Discord, and pressing a new sound replaces the one playing.

Or add it to Discord's own soundboard:

1. Hit Download on the sound you want.
2. In Discord open Server Settings › Soundboard and press Upload Sound.
3. Done – tap it from the 🔊 soundboard button in any voice call on that server.

No apps to install. Discord only takes short clips (about 5 seconds) and you need permission to add sounds to the server.