Simple Voice Chat: Voice Physics

An addon for Simple Voice Chat that makes proximity voice chat sound real:
voices fade with distance, get muffled behind walls, come round corners through doorways and echo in caves.

Client and server each work on their own. Paper, Purpur, Folia or Spigot server? Use the Voice Physics plugin instead.

Works alongside Sound Physics Remastered: Sound Physics handles game sounds while Voice Physics adds distance curves, doorway corners, whisper-vs-shout walls, HUD, radar and server sound zones for voices without doubling filters (one switch chooses whose walls and echo voices get).

✦ Distance — choose how voices fade: like Simple Voice Chat, realistic or steep, with no sudden cut-off at the edge. Presets Vanilla, Realistic, Clear and Stealth adapt to the server's voice range; a live graph shows the players you hear and a Listen button lets you try the fade.

✦ Walls — voices behind walls are quieter and duller. Wool and metal block more, glass and leaves less, open doors let sound through. A whisper is lost behind a wall; a shout still carries.

✦ Round corners — a voice from the next room comes through the doorway, duller the sharper the turn.

✦ Echo — short in a stone room, long in a cave, soft in a wooden house, none in a field. Near cliffs the voice comes back a moment later; caves, the Nether and the End each sound their own way.

✦ Water, rain and wind — voices are dull under water, rain and thunder cover far voices, and high up or in fast elytra flight the wind blows far voices away.

✦ Movement and facing (off by default) — a voice coming towards you sounds higher, one moving away lower; behind the speaker's back a voice is quieter, as with real speech.

✦ HUD — who is talking, how far, from where and whether behind a wall; while you talk, how many players hear you.

✦ Monitor and radar — everyone in voice range. Colors for color blindness, a bigger HUD, high contrast and subtitle-style arrows.

✦ Also — works with AudioPlayer & music disc addons (with its own switch) and Simple Radio; share your settings as one code, send a bug report with /voicephysics report. Seven languages.

Players without the addon hear voices muffled through walls too.

✦ Sound zones — a stage heard twice as far, a quiet library, a soundproof room, a cathedral with echo. Everyone sees the zone's name on entering. WorldGuard regions and Open Parties and Claims work too.

✦ Game rules — sneaking is quieter, the dead are silent, spectators talk only to each other, a goat horn works as a megaphone.

✦ Fair play — offer or enforce the server's settings for PvP and events, turn off the monitor and radar so nobody sees through walls.

✦ Require the addon — send a download link, remind on every join, or kick.

✦ Realism without the addon (off by default) — water, rain, echo, wind, facing, Doppler and the distance curve for players who only have voice chat.

✦ Admin tools — an in-game Server tab, clickable /vcd commands with undo, a log of who changed what, /vcd mute.

✦ Paper extras (off by default) — /voice for every player, PlaceholderAPI, a radio, loudspeakers, an eavesdrop item, a sculk reaction to shouts, chat-mute sync (EssentialsX, LiteBans, LibertyBans, AdvancedBan), Towny, Lands, WorldGuard and LuckPerms.

Before 1.20 the mod is made for 1.16.5, 1.17.1, 1.18.2, 1.19.2 and 1.19.4. Forge itself has no 1.20.5 and 1.21.2.

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