From 104295e06de315ce02c267b8d0eac5feaba71f28 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Tue, 18 Jan 2022 15:16:03 -0500
Subject: [PATCH] update TIA doc

---
 papers/doc/7-systems/tia.md | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/papers/doc/7-systems/tia.md b/papers/doc/7-systems/tia.md
index 15f53df6..3d9146af 100644
--- a/papers/doc/7-systems/tia.md
+++ b/papers/doc/7-systems/tia.md
@@ -9,4 +9,20 @@ Furnace isn't complete without this one...
 
 # effects
 
-none. we don't need no freakin' effects.
+- `10xx` select shape. `xx` may be one of:
+  - 0: nothing
+  - 1: buzzy
+  - 2: low buzzy
+  - 3: flangy
+  - 4: square
+  - 5: square
+  - 6: pure buzzy
+  - 7: reedy
+  - 8: noise
+  - 9: reedy
+  - 10: pure buzzy
+  - 11: nothing
+  - 12: low square
+  - 13: low square
+  - 14: low pure buzzy
+  - 15: low reedy
\ No newline at end of file