# Overview
Amplifier gives you control over how players sound in Simple Voice Chat. Drop someone's pitch to a growl, put cathedral reverb on a priest, let an announcer be heard across the whole server, or mute a troublemaker before anyone else has to hear them.
It's free, and it works alongside Simple Voice Chat rather than replacing it.
## Try it
Make someone sound like they're in a cave:
```
/amplifier pitch 0.7 Steve
/amplifier reverb 0.8 0.9 Steve
```
Put them back to normal:
```
/amplifier reset Steve
```
## What you can do
**Change how someone sounds.** Pitch and volume, adjusted live while they're talking.
**Add reverb.** Anything from a slight room to a huge echoing hall. Useful for dungeons, cathedrals, or making a boss sound enormous.
**Let someone be heard everywhere.** Broadcasting ignores distance entirely, so an announcer or an event host reaches the whole server.
**Change how far voices carry.** Server-wide, or for one person. Handy for giving a shouting NPC more reach, or making a stealth area whisper-quiet.
**Moderate it.** Mute one player, deafen one player, or switch voice chat off for everybody. A muted player's audio is dropped before it goes anywhere, so nobody hears them at all.
**Talk across dimensions.** Players in a group can hear each other even in different worlds.
**Run it across several servers.** With Redis, voice state stays in sync across your network.
**Remember settings.** Voice settings survive restarts, saved to a file or a real database if you'd rather.
## What you need
| | |
|---|---|
| Simple Voice Chat | required, on the server, and players need the client mod |
| Server | Paper 1.20 or newer |
| Java | 17 or newer |
Everything else Amplifier uses is bundled inside it.
## Where settings get saved
Three options, set with `storage.type`:
| Type | When to use it |
|---|---|
| `LOCAL` | The default. Plain files on the server. Fine for a single server |
| `MYSQL` | You already run MySQL, or you want several servers sharing settings |
| `MONGODB` | Same, if Mongo is what you run |
See [[Amplifier/Server Owners/Configuration]] for connection details.
## Permissions
| Permission | What it does |
|---|---|
| `lodestone.amplifier.bypass` | Lets someone talk even when voice chat is switched off for everyone else |
Command permissions are listed in [[Amplifier/Server Owners/Commands]].