diff --git a/adafruit_midi/control_change_values.py b/adafruit_midi/control_change_values.py
index bad9f71..78ccb34 100644
--- a/adafruit_midi/control_change_values.py
+++ b/adafruit_midi/control_change_values.py
@@ -44,15 +44,17 @@
 VOLUME = 7
 PAN = 10
 EXPRESSION = 11
+PORTAMENTO_TIME = 5
 SUSTAIN_PEDAL = 64
 PORTAMENTO = 65
 FILTER_RESONANCE = 71
 RELEASE_TIME = 72
-ATTACK_TIME = 74
+ATTACK_TIME = 73
 CUTOFF_FREQUENCY = 74
 DECAY_TIME = 75
 VIBRATO_RATE = 76
 VIBRATO_DEPTH = 77
 VIBRATO_DELAY = 78
+CHORUS = 93
 ALL_CONTROLLERS_OFF = 121
 ALL_NOTES_OFF = 123