diff --git a/src/main_osp.hh b/src/main_osp.hh
index 5069d9f..88cef9c 100644
--- a/src/main_osp.hh
+++ b/src/main_osp.hh
@@ -7,8 +7,6 @@
 #include "types.hh"
 
 namespace Heck {
-    using Samplerate = ld::SaiHandle::Config::SampleRate;
-
     namespace Constants {
         namespace Hardware {
             constexpr int PIN_BUTTON_RECORD = 28;
diff --git a/src/types.hh b/src/types.hh
index b173ff1..e2974db 100644
--- a/src/types.hh
+++ b/src/types.hh
@@ -7,7 +7,7 @@
 
 namespace Heck {
 
-    // Types
+    // fundamental types
     using u8 = uint8_t;
     using u16 = uint16_t;
     using u32 = uint32_t;
@@ -24,6 +24,10 @@ namespace Heck {
     // namespace aliases
     namespace ld = daisy;
     namespace dsp = daisysp;
+
+    // type aliases from libs
+    using Samplerate = ld::SaiHandle::Config::SampleRate;
+
 } // namespace Heck