avfilter: add audio surround upmixer

Signed-off-by: Paul B Mahol <onemda@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Changelog b/Changelog
index 1949ec7846..3533bdc682 100644
--- a/Changelog
+++ b/Changelog
@@ -16,6 +16,7 @@ version <next>:
 - spec compliant VP9 muxing support in MP4
 - remove the libnut muxer/demuxer wrappers
 - remove the libschroedinger encoder/decoder wrappers
+- surround audio filter
 
 version 3.3:
 - CrystalHD decoder moved to new decode API