diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20ca9566..c63d3068 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@
 * Control-rate generators for value interpolation, patterns, random numbers, and markov chains. 
 * Scheduable musical events: Tone.Event, Tone.Loop, Tone.Part, Tone.Pattern, Tone.Sequence. 
 * Player's playbackRate is now a signal and Noise includes a playbackRate signal. 
+* All filterEnvelopes use new Tone.FrequencyEnvelope with frequency units and `baseFrequency` and `octaves` instead of `min` and `max`. 
 
 DEPRECATED:
 * `setTimeout`, `setInterval`, `setTimeline` in favor of new `schedule`, `scheduleOnce`, and `scheduleRepeat`.