From a4d4e9e5b076bd1346edb9afb516feda1b723d42 Mon Sep 17 00:00:00 2001
From: hogliux <fabian.renn@gmail.com>
Date: Mon, 31 Jul 2017 12:58:03 +0100
Subject: [PATCH] WaveAudioFormatWriter:  Don't add an extended format chunk if
 the wav file only has one or two channels

---
 modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp b/modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp
index 304772fd8a..073f3c5035 100644
--- a/modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp
+++ b/modules/juce_audio_formats/codecs/juce_WavAudioFormat.cpp
@@ -1476,7 +1476,12 @@ private:
 
     static int getChannelMaskFromChannelLayout (const AudioChannelSet& channelLayout)
     {
-        if (channelLayout.isDiscreteLayout() || channelLayout == AudioChannelSet::mono())
+        if (channelLayout.isDiscreteLayout())
+            return 0;
+
+        // Don't add an extended format chunk for mono and stereo. Basically, all wav players
+        // interpret a wav file with only one or two channels to be mono or stereo anyway.
+        if (channelLayout == AudioChannelSet::mono() || channelLayout == AudioChannelSet::stereo())
             return 0;
 
         auto channels = channelLayout.getChannelTypes();