How it works

Load your own copy of an update, official or already customised (nothing is uploaded: everything happens in your browser).
Replace the sounds you want (WAV, MP3, MP4, M4A, OGG or .bin). Tip: use mono sounds rather than stereo, otherwise the resulting sound may be quieter.
Accept the terms then click Generate request: you get a small encrypted .dcyx file that only the bot can read.
Send it to the Discord bot with /build, attaching two files: the .dcyx and the update you loaded here (official or custom): it sends your update back privately.