diff --git a/src/constants.rs b/src/constants.rs
new file mode 100644
index 0000000..f5e30b5
--- /dev/null
+++ b/src/constants.rs
@@ -0,0 +1,4 @@
+pub const DEFAULT_MUSIC_EXTENSION: &str = FLAC_EXTENSION;
+pub const FLAC_EXTENSION: &str = ".flac";
+pub const WAV_EXTENSION: &str = ".wav";
+pub const MPTHREE_EXTENSION: &str = ".mp3";
diff --git a/src/lib.rs b/src/lib.rs
index 3e0f797..425aff6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,5 @@
 pub mod access_level;
+pub mod constants;
 pub mod login_result;
 pub mod song;
 pub mod token;