From 1f720e46e554ac278e25e3d80b771844ddb1dae5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C5=82az=CC=87ej=20Pankowski?=
 <86720177+pblazej@users.noreply.github.com>
Date: Fri, 7 Nov 2025 11:37:57 +0100
Subject: [PATCH 1/3] Move engine checks

---
 Sources/LiveKit/Audio/MixerEngineObserver.swift | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/Sources/LiveKit/Audio/MixerEngineObserver.swift b/Sources/LiveKit/Audio/MixerEngineObserver.swift
index df4422056..038e8d5ce 100644
--- a/Sources/LiveKit/Audio/MixerEngineObserver.swift
+++ b/Sources/LiveKit/Audio/MixerEngineObserver.swift
@@ -206,6 +206,13 @@ extension MixerEngineObserver {
 
     // Capture appAudio and apply conversion automatically suitable for internal audio engine.
     public func capture(appAudio inputBuffer: AVAudioPCMBuffer) {
+        guard let converter = converter(for: inputBuffer.format) else {
+            log("Failed to get converter for input buffer format: \(inputBuffer.format)", .warning)
+            return
+        }
+
+        let buffer = converter.convert(from: inputBuffer)
+
         let (isConnected, appNode) = _state.read {
             ($0.isInputConnected, $0.appNode)
         }
@@ -215,12 +222,6 @@ extension MixerEngineObserver {
             return
         }
 
-        // Create or update the converter if needed
-        let converter = converter(for: inputBuffer.format)
-
-        guard let converter else { return }
-
-        let buffer = converter.convert(from: inputBuffer)
         appNode.scheduleBuffer(buffer)
 
         if !appNode.isPlaying {

From bda70d30b4818575fc063aeaeac3f9a9bdf12deb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C5=82az=CC=87ej=20Pankowski?=
 <86720177+pblazej@users.noreply.github.com>
Date: Fri, 7 Nov 2025 11:39:08 +0100
Subject: [PATCH 2/3] Change

---
 .changes/broadcast-crash | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .changes/broadcast-crash

diff --git a/.changes/broadcast-crash b/.changes/broadcast-crash
new file mode 100644
index 000000000..c334bb724
--- /dev/null
+++ b/.changes/broadcast-crash
@@ -0,0 +1 @@
+patch type="fixed" "Crash when moving apps to background during broadcast"

From 01f9dd60fa15d34e0d2070dff7d389753fe55cbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=C5=82az=CC=87ej=20Pankowski?=
 <86720177+pblazej@users.noreply.github.com>
Date: Fri, 7 Nov 2025 11:42:45 +0100
Subject: [PATCH 3/3] Double check

---
 Sources/LiveKit/Audio/MixerEngineObserver.swift | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Sources/LiveKit/Audio/MixerEngineObserver.swift b/Sources/LiveKit/Audio/MixerEngineObserver.swift
index 038e8d5ce..7ae8d8f66 100644
--- a/Sources/LiveKit/Audio/MixerEngineObserver.swift
+++ b/Sources/LiveKit/Audio/MixerEngineObserver.swift
@@ -224,7 +224,7 @@ extension MixerEngineObserver {
 
         appNode.scheduleBuffer(buffer)
 
-        if !appNode.isPlaying {
+        if !appNode.isPlaying, let engine = appNode.engine, engine.isRunning {
             appNode.play()
         }
     }