X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_mapping.cc;h=40dc4ebfa5bc042542a1cb9b112404c863e9c6ef;hb=5932cc8c99ff9704deab0eb309101ed00c4f570d;hp=94efbe49bff57a416e87dcc284d6d3a11d6df7e7;hpb=2bec3708fc744c18128c5bdb4c2a332f5c8eb283;p=dcpomatic.git

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
index 94efbe49b..40dc4ebfa 100644
--- a/src/lib/audio_mapping.cc
+++ b/src/lib/audio_mapping.cc
@@ -237,7 +237,7 @@ AudioMapping::mapped_output_channels () const
 	list<int> mapped;
 
 	for (vector<vector<float> >::const_iterator i = _gain.begin(); i != _gain.end(); ++i) {
-		for (size_t j = 0; j < i->size(); ++j) {
+		BOOST_FOREACH (dcp::Channel j, dcp::used_audio_channels()) {
 			if (abs ((*i)[j]) > minus_96_db) {
 				mapped.push_back (j);
 			}