From 9565b6e99b7a2db09098437a3bb958acb937b17a Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 29 Nov 2023 02:26:07 +0100
Subject: Don't reduce the audio channel count on adding ATMOS (only increase
 it, if required).

---
 src/lib/film.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/lib/film.cc b/src/lib/film.cc
index 7ba245422..a5b393cc1 100644
--- a/src/lib/film.cc
+++ b/src/lib/film.cc
@@ -1400,7 +1400,9 @@ Film::add_content (shared_ptr<Content> c)
 
 	maybe_set_container_and_resolution ();
 	if (c->atmos) {
-		set_audio_channels (14);
+		if (_audio_channels < 14) {
+			set_audio_channels(14);
+		}
 		set_interop (false);
 	}
 }
-- 
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