From 40ef5f3b153bbc8ee0c54977f4cccb1343c01858 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 3 Jun 2024 22:24:38 +0200
Subject: [PATCH] Fix repeat of stem-export of stereo channels

Restoring the export profile state previously added a new
Export Processor for each state for each channel to the same
route.

This fixes silent stem export channels after an initial
correct stem export (which saves ExportChannelConfiguration)
---
 libs/ardour/export_channel.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libs/ardour/export_channel.cc b/libs/ardour/export_channel.cc
index efe148a272..5085fb9217 100644
--- a/libs/ardour/export_channel.cc
+++ b/libs/ardour/export_channel.cc
@@ -385,6 +385,11 @@ RouteExportChannel::create_from_route (std::list<ExportChannelPtr>& result, std:
 void
 RouteExportChannel::create_from_state (std::list<ExportChannelPtr>& result, Session& s, XMLNode* node)
 {
+	uint32_t chn;
+	if (node->get_property ("number", chn) && chn > 1) {
+		/* create_from_route adds ExportChannel for all channels of a given Route */
+		return;
+	}
 	XMLNode* xml_route = node->child ("Route");
 	if (!xml_route) {
 		return;