diff --git a/res/content/base/sounds/base.test_mono_1.ogg b/res/content/base/sounds/base.test_mono_1.ogg
new file mode 100644
index 000000000..4ae5d137c
Binary files /dev/null and b/res/content/base/sounds/base.test_mono_1.ogg differ
diff --git a/res/content/base/sounds/base.test_mono_2.ogg b/res/content/base/sounds/base.test_mono_2.ogg
new file mode 100644
index 000000000..634b74727
Binary files /dev/null and b/res/content/base/sounds/base.test_mono_2.ogg differ
diff --git a/res/content/base/sounds/base.test_stereo.ogg b/res/content/base/sounds/base.test_stereo.ogg
index d58469cc5..227b3fb22 100644
Binary files a/res/content/base/sounds/base.test_stereo.ogg and b/res/content/base/sounds/base.test_stereo.ogg differ