diff --git a/src/engine/agent/Agent_AudioManager.cpp b/src/engine/agent/Agent_AudioManager.cpp
index f7da74c9..0145bd8f 100644
--- a/src/engine/agent/Agent_AudioManager.cpp
+++ b/src/engine/agent/Agent_AudioManager.cpp
@@ -167,6 +167,12 @@ void AudioManager::stop(int usageId)
     }
 }
 
+void AudioManager::setAudioInput(Audio::PInputDevice input)
+{
+    LOCK_MANAGER;
+    mAudioInput = std::move(input);
+}
+
 void AudioManager::startPlayFile(int usageId, const std::string& path, AudioTarget target, LoopMode lm, int timelimit)
 {
     // Check if file exists
diff --git a/src/engine/agent/Agent_AudioManager.h b/src/engine/agent/Agent_AudioManager.h
index 8d6321de..8cb6e361 100644
--- a/src/engine/agent/Agent_AudioManager.h
+++ b/src/engine/agent/Agent_AudioManager.h
@@ -53,6 +53,11 @@ public:
     void start(int usageId);
     void stop(int usageId);
 
+    // Inject a custom input device. Must be called before start(): when set,
+    // start() skips construction of the default platform microphone. Pass an
+    // empty pointer to clear the override.
+    void setAudioInput(Audio::PInputDevice input);
+
     enum AudioTarget
     {
         atNull,