diff --git a/examples/audio.cpp b/examples/audio.cpp
index 62ee5253..9703f06f 100644
--- a/examples/audio.cpp
+++ b/examples/audio.cpp
@@ -12,6 +12,7 @@
 #include <psemek/audio/effect/pause.hpp>
 #include <psemek/audio/effect/loop.hpp>
 #include <psemek/audio/effect/pitch.hpp>
+#include <psemek/audio/effect/distortion.hpp>
 #include <psemek/audio/duplicate.hpp>
 #include <psemek/audio/stereo.hpp>
 #include <psemek/audio/mixer.hpp>
@@ -89,6 +90,7 @@ struct audio_app
 		{
 			int midi = key_to_midi.at(key);
 			auto tone = audio::karplus_strong(440.f * std::pow(2.f, (midi - 69) / 12.f));
+			tone = audio::distortion(std::move(tone));
 			channels_[key] = mixer_->add(audio::fade_in(tone, 0.002f));
 		}