diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 155a01e32e..adf5c1113d 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -6,6 +6,8 @@
 * MP4: Fix for playback of media containing basic edit lists.
 * QuickTime: Fix parsing of QuickTime style audio sample entry.
 * HLS: Add H262 support for devices that have an H262 decoder.
+* Allow AudioTrack PlaybackParams (e.g. speed/pitch) on API level 23+.
+* Correctly detect 4K displays on API level 23+.
 * Misc bug fixes.
 
 ### r1.5.2 ###