diff --git a/AudioStreaming/Streaming/AudioPlayer/AudioPlayer.swift b/AudioStreaming/Streaming/AudioPlayer/AudioPlayer.swift
index 13fba34..a17d0d0 100644
--- a/AudioStreaming/Streaming/AudioPlayer/AudioPlayer.swift
+++ b/AudioStreaming/Streaming/AudioPlayer/AudioPlayer.swift
@@ -225,6 +225,10 @@ open class AudioPlayer {
     }
 
     deinit {
+        // The IO thread keeps pulling from the render callback until the hardware is stopped,
+        // so stop it before the buffers it renders into are freed.
+        player.auAudioUnit.stopHardware()
+        audioEngine.stop()
         playerContext.audioPlayingEntry?.close()
         clearQueue()
         rendererContext.clean()