diff --git a/FW/m5stack_audio/src/main.cpp b/FW/m5stack_audio/src/main.cpp
index b6b11b6..cd2b334 100644
--- a/FW/m5stack_audio/src/main.cpp
+++ b/FW/m5stack_audio/src/main.cpp
@@ -34,7 +34,6 @@ void setup()
   M5.Lcd.printf("Sample MP3 playback begins...\n");
   Serial.printf("Sample MP3 playback begins...\n");
 
-  // pno_cs from https://ccrma.stanford.edu/~jos/pasp/Sound_Examples.html
   file = new AudioFileSourceSD("/003.mp3");
   id3 = new AudioFileSourceID3(file);
   out = new AudioOutputI2S(0, 0); // Output to builtInDAC