1 files changed, 5 insertions, 0 deletions
diff --git a/src/tests/test_audio_backend.cc b/src/tests/test_audio_backend.cc
index 4bd5a53..6a748aa 100644
--- a/src/tests/test_audio_backend.cc
+++ b/src/tests/test_audio_backend.cc
@@ -38,6 +38,11 @@ class TestBackend : public AudioBackend {
     shutdown_called = true;
   }
 
+  float get_realtime_peak() override {
+    // Test backend: return synthetic peak
+    return 0.5f;
+  }
+
   void on_voice_triggered(float timestamp, int spectrogram_id, float volume,
                           float pan) override {
     events.push_back({timestamp, spectrogram_id, volume, pan});