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-rw-r--r--src/lib/util.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/lib/util.cc b/src/lib/util.cc
index 395c53e31..66743250f 100644
--- a/src/lib/util.cc
+++ b/src/lib/util.cc
@@ -367,7 +367,7 @@ dcp_audio_sample_rate (int fs)
int
dcp_audio_channels (int f)
{
- if (f) {
+ if (f == 1) {
/* The source is mono, so to put the mono channel into
the centre we need to generate a 5.1 soundtrack.
*/