From b946c35fa7f88f3ddc364a31f7e5bad7fe25bd98 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Wed, 23 Aug 2023 12:21:39 -0500
Subject: [PATCH] GUI: don't update FM/wave synth preview twice

issue #1404
---
 src/gui/dataList.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/gui/dataList.cpp b/src/gui/dataList.cpp
index dce62c82a..1506c5ff3 100644
--- a/src/gui/dataList.cpp
+++ b/src/gui/dataList.cpp
@@ -105,8 +105,10 @@ void FurnaceGUI::insListItem(int i, int dir, int asset) {
   bool insPressed=ImGui::IsItemActivated();
   if (insReleased || (!insListDir && insPressed)) {
     curIns=i;
-    wavePreviewInit=true;
-    updateFMPreview=true;
+    if (!insReleased || insListDir) {
+      wavePreviewInit=true;
+      updateFMPreview=true;
+    }
     lastAssetType=0;
     if (settings.insFocusesPattern && patternOpen)
       nextWindow=GUI_WINDOW_PATTERN;