Update RELEASENOTES.md

diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 64cf64dc937805a4c9fe2f55ec97349f97818b7c..37963d84dfaef96429a6ae21bbeec15ec5dee9e8 100644 (file)
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -4,6 +4,9 @@ Version 3.2d4
 **Change of Default**
 * The default value for the `alsa` setting `mute_using_playback_switch` has been change to `"no"` for compatability with other audio players on the same machine. The reason is that when this setting is set to `"yes"`, the output device will be muted when Shairport Sync releases it. Unfortunately, other audio players using the output device expect it to be unmuted, causing problems. Thanks to [Tim Curtis](https://github.com/moodeaudio) at [Moode Audio](http://moodeaudio.org) and [Peter Pablo](https://github.com/PeterPablo) for clarifying the issue.
 
+**Important Note**
+* When you update to the this version of Shairport Sync, your output device may have been left in a muted state by a previous version of Shairport Sync. You should use a command line tool like `alsamixer` to unmute the output device before further use. 
+
 Version 3.2d3
 ====