diff --git a/v1/types.go b/v1/types.go
index f0e57eb..0a3a82b 100644
--- a/v1/types.go
+++ b/v1/types.go
@@ -106,6 +106,7 @@ type ChannelSettings struct {
 	CustomerExternalID string                     `json:"customer_external_id,omitempty"`
 	SendingPolicy      SendingPolicy              `json:"sending_policy,omitempty"`
 	Suggestions        ChannelSettingsSuggestions `json:"suggestions,omitempty"`
+	Audio              ChannelSettingsAudio       `json:"audio"`
 }
 
 // Product type.
@@ -139,13 +140,20 @@ type ChannelSettingsText struct {
 
 // ChannelSettingsFilesBase struct.
 type ChannelSettingsFilesBase struct {
-	Creating             string `json:"creating,omitempty"`
-	Editing              string `json:"editing,omitempty"`
-	Quoting              string `json:"quoting,omitempty"`
-	Deleting             string `json:"deleting,omitempty"`
-	Max                  uint64 `json:"max_items_count,omitempty"`
-	CommentAttribute     string `json:"comment_attribute,omitempty"`
-	CommentMaxCharsCount int    `json:"comment_max_chars_count,omitempty"`
+	Creating          string  `json:"creating,omitempty"`
+	Editing           string  `json:"editing,omitempty"`
+	Quoting           string  `json:"quoting,omitempty"`
+	Deleting          string  `json:"deleting,omitempty"`
+	Max               uint64  `json:"max_items_count,omitempty"`
+	NoteMaxCharsCount *uint16 `json:"note_max_chars_count,omitempty"`
+}
+
+// ChannelSettingsAudio struct.
+type ChannelSettingsAudio struct {
+	Creating      string `json:"creating,omitempty"`
+	Quoting       string `json:"quoting,omitempty"`
+	Deleting      string `json:"deleting,omitempty"`
+	MaxItemsCount uint64 `json:"max_items_count,omitempty"`
 }
 
 type SendingPolicy struct {