diff --git a/src-tauri/src/commands/config.rs b/src-tauri/src/commands/config.rs
new file mode 100644
index 0000000..961b2da
--- /dev/null
+++ b/src-tauri/src/commands/config.rs
@@ -0,0 +1,64 @@
+use serde::{Deserialize, Serialize};
+use std::fs;
+use std::sync::Mutex;
+use tauri::{AppHandle, Manager, State};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Config {
+    pub audio_device_name: Option<String>,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            audio_device_name: None,
+        }
+    }
+}
+
+pub struct ConfigState(pub Mutex<Config>);
+
+fn config_file_path(app: &AppHandle) -> Result<std::path::PathBuf, String> {
+    let dir = app
+        .path()
+        .app_data_dir()
+        .map_err(|e| format!("Failed to resolve app data dir: {e}"))?;
+    fs::create_dir_all(&dir).map_err(|e| format!("Failed to create app data dir: {e}"))?;
+    Ok(dir.join("config.json"))
+}
+
+#[tauri::command]
+pub fn update_config(state: State<ConfigState>, config: Config) -> Result<(), String> {
+    *state.0.lock().unwrap() = config;
+    Ok(())
+}
+
+#[tauri::command]
+pub fn save_config(app: AppHandle, state: State<ConfigState>) -> Result<(), String> {
+    let path = config_file_path(&app)?;
+    let config = state.0.lock().unwrap();
+
+    let json = serde_json::to_string_pretty(&*config)
+        .map_err(|e| format!("Failed to serialize config: {e}"))?;
+
+    fs::write(&path, json).map_err(|e| format!("Failed to write config: {e}"))?;
+
+    Ok(())
+}
+
+#[tauri::command]
+pub fn get_config(app: AppHandle, state: State<ConfigState>) -> Result<Config, String> {
+    let path = config_file_path(&app)?;
+
+    let config = if path.exists() {
+        let json = fs::read_to_string(&path).map_err(|e| format!("Failed to read config: {e}"))?;
+        serde_json::from_str(&json).map_err(|e| format!("Failed to parse config: {e}"))?
+    } else {
+        Config::default()
+    };
+
+    *state.0.lock().unwrap() = config.clone();
+
+    Ok(config)
+}
diff --git a/src-tauri/src/commands/mod.rs b/src-tauri/src/commands/mod.rs
index f8c30cc..62c6f59 100644
--- a/src-tauri/src/commands/mod.rs
+++ b/src-tauri/src/commands/mod.rs
@@ -1,3 +1,4 @@
 pub mod accounts;
 pub mod audio;
+pub mod config;
 pub mod server_list;
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index 72949f3..5309958 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -1,3 +1,7 @@
+use std::sync::Mutex;
+
+use crate::commands::config::ConfigState;
+
 pub mod commands;
 pub mod types;
 
@@ -5,12 +9,16 @@ pub mod types;
 pub fn run() {
     tauri::Builder::default()
         .plugin(tauri_plugin_opener::init())
+        .manage(ConfigState(Mutex::new(commands::config::Config::default())))
         .invoke_handler(tauri::generate_handler![
             commands::server_list::save_server_list,
             commands::server_list::get_server_list,
             commands::accounts::save_accounts,
             commands::accounts::get_accounts,
             commands::audio::list_input_devices,
+            commands::config::update_config,
+            commands::config::save_config,
+            commands::config::get_config,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");
diff --git a/src/lib/config.ts b/src/lib/config.ts
new file mode 100644
index 0000000..a7194e8
--- /dev/null
+++ b/src/lib/config.ts
@@ -0,0 +1,17 @@
+import { invoke } from "@tauri-apps/api/core";
+
+export type Config = {
+  audioDeviceName: string | null;
+};
+
+export async function updateConfig(config: Config): Promise<void> {
+  await invoke("update_config", { config });
+}
+
+export async function saveConfig(): Promise<void> {
+  await invoke("save_config");
+}
+
+export async function getConfig(): Promise<Config> {
+  return await invoke("get_config");
+}