From f02e38d56090a50e1d269f85b61924ef8613ada6 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Sat, 21 Jun 2025 10:18:54 -0500
Subject: [PATCH] do not allow user to play notes during export

issue #2579
---
 src/engine/playback.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/engine/playback.cpp b/src/engine/playback.cpp
index ce8ed4926..4378de719 100644
--- a/src/engine/playback.cpp
+++ b/src/engine/playback.cpp
@@ -1577,6 +1577,9 @@ bool DivEngine::nextTick(bool noAccum, bool inhibitLowLat) {
     cycles++;
   }
 
+  // don't let user play anything during export
+  if (exporting) pendingNotes.clear();
+
   if (!pendingNotes.empty()) {
     bool isOn[DIV_MAX_CHANS];
     memset(isOn,0,DIV_MAX_CHANS*sizeof(bool));
@@ -2299,7 +2302,7 @@ void DivEngine::nextBuf(float** in, float** out, int inChans, int outChans, unsi
   }
   
   // process sample/wave preview
-  if ((sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) || (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size())) {
+  if (((sPreview.sample>=0 && sPreview.sample<(int)song.sample.size()) || (sPreview.wave>=0 && sPreview.wave<(int)song.wave.size())) && !exporting) {
     unsigned int samp_bbOff=0;
     unsigned int prevAvail=blip_samples_avail(samp_bb);
     if (prevAvail>size) prevAvail=size;