diff --git a/nodes/testpattern/main.cpp b/nodes/testpattern/main.cpp
index bbe1b26..a299513 100644
--- a/nodes/testpattern/main.cpp
+++ b/nodes/testpattern/main.cpp
@@ -69,8 +69,9 @@ class TestPatternNode : public dmf::NodeBase {
         const size_t      samples_per_frame =
             static_cast<size_t>(sample_rate) * static_cast<size_t>(fps_den) / static_cast<size_t>(fps_num);
 
-        // -18 dBFS broadcast reference level
-        const float amplitude = static_cast<float>(std::pow(10.0, -18.0 / 20.0));
+        // default -18 dBFS broadcast reference level
+        const float amplitude_db = config().value("amplitude_db", -18.0f);
+        const float amplitude    = std::pow(10.0f, amplitude_db / 20.0f);
 
         uint64_t video_index = mxlGetCurrentIndex(&video_rate);
         uint64_t audio_index = 0;