diff --git a/src-tauri/src/jellyfin/client.rs b/src-tauri/src/jellyfin/client.rs
index 7786e69..b8f1dd0 100644
--- a/src-tauri/src/jellyfin/client.rs
+++ b/src-tauri/src/jellyfin/client.rs
@@ -302,24 +302,42 @@ impl JellyfinClient {
         self.post(&format!("/Sessions/{}/Playing/Seek", session_id), &request).await
     }
 
+    /// Send a full GeneralCommand to a remote session.
+    /// Uses POST /Sessions/{id}/Command with a body containing Name and Arguments.
+    /// This is required for commands that need arguments (e.g. SetVolume).
+    async fn send_general_command(
+        &self,
+        session_id: &str,
+        command_name: &str,
+        arguments: Option<serde_json::Value>,
+    ) -> Result<(), String> {
+        let mut payload = serde_json::json!({
+            "Name": command_name,
+        });
+
+        if let Some(args) = arguments {
+            payload["Arguments"] = args;
+        }
+
+        log::info!("[JellyfinClient] Sending GeneralCommand '{}' to session {} with payload: {}",
+                   command_name, session_id, serde_json::to_string(&payload).unwrap_or_default());
+
+        self.post(
+            &format!("/Sessions/{}/Command", session_id),
+            &payload
+        ).await
+    }
+
     /// Set volume on a remote session
     pub async fn session_set_volume(
         &self,
         session_id: String,
         volume: i32,
     ) -> Result<(), String> {
-        let payload = serde_json::json!({
-            "Arguments": {
-                "Volume": volume.to_string()
-            }
-        });
-
-        log::info!("[JellyfinClient] Setting volume on session {} to {} with payload: {}",
-                   session_id, volume, serde_json::to_string(&payload).unwrap_or_default());
-
-        self.post(
-            &format!("/Sessions/{}/Command/SetVolume", session_id),
-            &payload
+        self.send_general_command(
+            &session_id,
+            "SetVolume",
+            Some(serde_json::json!({ "Volume": volume.to_string() })),
         ).await
     }
 
@@ -330,9 +348,10 @@ impl JellyfinClient {
     ) -> Result<(), String> {
         log::info!("[JellyfinClient] Toggling mute on session {}", session_id);
 
-        self.post(
-            &format!("/Sessions/{}/Command/ToggleMute", session_id),
-            &serde_json::json!({})
+        self.send_general_command(
+            &session_id,
+            "ToggleMute",
+            None,
         ).await
     }