--- a/CHANGES	Mon Oct 07 08:24:24 2024 +0000
+++ b/CHANGES	Mon Oct 07 18:21:32 2024 +0000
@@ -1,3 +1,26 @@
+Changes from gsm-codec-lib-r3 to gsm-codec-lib-r4:
+
+* Libgsmfr2 evolved from version 2.0.0 to version 2.1.0: see
+  doc/FR1-library-history for the details.
+
+* Libgsmefr evolved from version 1.1.0 to version 1.2.0: see
+  doc/EFR-library-history for the details.
+
+* Command line utilities support the new hexadecimal file format of TW-TS-005
+  Annex A for FR and EFR codecs (see doc/TW-TS-005 article):
+
+  + tw5a-dump parses TW-TS-005 Annex A files in the same way how gsmrec-dump
+    parses gsmx binary files;
+
+  + gsm[e]fr-decode-tw5[-r] are new speech decoder utilities that read their
+    input from TW-TS-005 Annex A files;
+
+  + gsmx-to-tw5a and tw5a-to-gsmx conversion utilities should be sufficient for
+    most other use cases.
+
+* New command line utility gsmfr-tfo-xfrm exercises TFO transform addition to
+  libgsmfr2.
+
 Changes from gsm-codec-lib-r2 to gsm-codec-lib-r3:
 
 * Libgsmfrp has been replaced with libgsmfr2, a major version change per SemVer.