diff --git a/src/svf_simper.rs b/src/svf_simper.rs
index a3046d0..bb07faa 100644
--- a/src/svf_simper.rs
+++ b/src/svf_simper.rs
@@ -195,6 +195,8 @@ where
 
 
 implement all filter types
+see: git@github.com:AquaEBM/filte.rs.git
+benchmark against it
 
 make nonlin variants
 
diff --git a/todo.org b/todo.org
index 4b77150..683b5b3 100644
--- a/todo.org
+++ b/todo.org
@@ -12,6 +12,7 @@
 
 * soon
 ** downgrade macos (& ubuntu?)
+** use https://build.opensuse.org/
 ** make attack and release continuously update
 ** better interpolation panner delay
 *** use separate crate for panner delay?