From d42c98b0c52653ea0a8cfeb0f16a1f0779c36ba3 Mon Sep 17 00:00:00 2001
From: shogo4405 <shogo4405@gmail.com>
Date: Fri, 12 Jul 2024 10:05:49 +0900
Subject: [PATCH] refs #1503

---
 Sources/IO/IOStream.swift | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Sources/IO/IOStream.swift b/Sources/IO/IOStream.swift
index a6a5ce8d5..b42eb43b8 100644
--- a/Sources/IO/IOStream.swift
+++ b/Sources/IO/IOStream.swift
@@ -185,10 +185,12 @@ open class IOStream: NSObject {
     /// Specifies the audio mixer settings.
     public var audioMixerSettings: IOAudioMixerSettings {
         get {
-            mixer.audioIO.mixerSettings
+            mixer.audioIO.lockQueue.sync { self.mixer.audioIO.mixerSettings }
         }
         set {
-            mixer.audioIO.mixerSettings = newValue
+            mixer.audioIO.lockQueue.async {
+                self.mixer.audioIO.mixerSettings = newValue
+            }
         }
     }