diff --git a/opus-populi.md b/opus-populi.md
index f12f5cb41..a394cf852 100644
--- a/opus-populi.md
+++ b/opus-populi.md
@@ -1,4 +1,6 @@
 # opus populi
 
 - a [[coop]] run version of [[spotify]].
-    - [[opus populi]]
+    - [[opus]]
+
+https://twitter.com/flancian/status/1379042756601995266
diff --git a/opus.md b/opus.md
new file mode 100644
index 000000000..c7fc03c3b
--- /dev/null
+++ b/opus.md
@@ -0,0 +1,9 @@
+# opus
+
+- a word
+  - [[work]], [[obra]]
+- a [[codec]]
+  - [[pull]] [[opus codec]]
+
+https://twitter.com/flancian/status/1379043164212891655
+