:art: uncurse FMSynth a bit

diff --git a/plug b/plug
index 5840438e0ddd2963a83733957d8abaa443392c76..a7f57ef9dec1fa797ab295adf89d8509d7a636dc 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit 5840438e0ddd2963a83733957d8abaa443392c76
+Subproject commit a7f57ef9dec1fa797ab295adf89d8509d7a636dc