Additional info to comment

Author: cwoffenden

system/lib/pthread/emscripten_thread_state.S

@@ -53,7 +53,8 @@ emscripten_is_main_browser_thread:
   global.get is_main_thread
   end_function
 
-# Semantically the same as testing "!ENVIRONMENT_IS_WEB" in JS
+# Semantically the same as testing "!ENVIRONMENT_IS_WEB" in JS (except for the
+# case of Audio Worklets, which aren't web but don't support atomic waits)
 .globl _emscripten_thread_supports_atomics_wait
 _emscripten_thread_supports_atomics_wait:
   .functype _emscripten_thread_supports_atomics_wait () -> (i32)