diff --git a/src/main.cpp b/src/main.cpp
index 0afe6f8..aaf5808 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -38,6 +38,7 @@
 // Later:
 //   beat detection
 //   waveform animation
+//   pcm from pulse
 
 
 const size_t width = 10;