diff --git a/src/libultra/voice/voicecheckword.c b/src/libultra/voice/voicecheckword.c
index 8b5ac0dfb..4da8d5a00 100644
--- a/src/libultra/voice/voicecheckword.c
+++ b/src/libultra/voice/voicecheckword.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Checks whether or not a word can be registered in the dictionary
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicecheckword/osVoiceCheckWord.s")
diff --git a/src/libultra/voice/voicecleardictionary.c b/src/libultra/voice/voicecleardictionary.c
index 29766bb2a..d6278d3fa 100644
--- a/src/libultra/voice/voicecleardictionary.c
+++ b/src/libultra/voice/voicecleardictionary.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Initializes Voice Recognition System word registration dictionary
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicecleardictionary/osVoiceClearDictionary.s")
diff --git a/src/libultra/voice/voicecontrolgain.c b/src/libultra/voice/voicecontrolgain.c
index 9dc541cc5..d4020e605 100644
--- a/src/libultra/voice/voicecontrolgain.c
+++ b/src/libultra/voice/voicecontrolgain.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Adjusts the input gain of the Voice Recognition System
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicecontrolgain/osVoiceControlGain.s")
diff --git a/src/libultra/voice/voicegetreaddata.c b/src/libultra/voice/voicegetreaddata.c
index 5940a1f8b..c0987c151 100644
--- a/src/libultra/voice/voicegetreaddata.c
+++ b/src/libultra/voice/voicegetreaddata.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Gets voice recognition result from the Voice Recognition System
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicegetreaddata/osVoiceGetReadData.s")
diff --git a/src/libultra/voice/voiceinit.c b/src/libultra/voice/voiceinit.c
index 920bc4818..69fd1e36e 100644
--- a/src/libultra/voice/voiceinit.c
+++ b/src/libultra/voice/voiceinit.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Initializes Voice Recognition System control structure and hardware
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voiceinit/osVoiceInit.s")
diff --git a/src/libultra/voice/voicemaskdictionary.c b/src/libultra/voice/voicemaskdictionary.c
index 3de841de3..e82a27b81 100644
--- a/src/libultra/voice/voicemaskdictionary.c
+++ b/src/libultra/voice/voicemaskdictionary.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Mask words registered in the voice recognition system
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicemaskdictionary/osVoiceMaskDictionary.s")
diff --git a/src/libultra/voice/voicesetword.c b/src/libultra/voice/voicesetword.c
index e50f26874..dbc1a6df6 100644
--- a/src/libultra/voice/voicesetword.c
+++ b/src/libultra/voice/voicesetword.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Registers words to the Voice Recognition System dictionary
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicesetword/osVoiceSetWord.s")
diff --git a/src/libultra/voice/voicestartreaddata.c b/src/libultra/voice/voicestartreaddata.c
index e7105a7d4..118cc3f60 100644
--- a/src/libultra/voice/voicestartreaddata.c
+++ b/src/libultra/voice/voicestartreaddata.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Start voice recognition by the Voice Recognition System
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicestartreaddata/osVoiceStartReadData.s")
diff --git a/src/libultra/voice/voicestopread.c b/src/libultra/voice/voicestopread.c
index f032fc40e..16ecddef8 100644
--- a/src/libultra/voice/voicestopread.c
+++ b/src/libultra/voice/voicestopread.c
@@ -1,3 +1,4 @@
 #include "global.h"
 
+// Forcibly stops voice recognition processing by the Voice Recognition System
 #pragma GLOBAL_ASM("asm/non_matchings/boot/voicestopread/osVoiceStopReadData.s")