2 files changed, 3 insertions, 0 deletions
diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index 2a1dfbfc7..dd3f11444 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -20,6 +20,7 @@ import {
     AclPrivate,
     AclReadonly,
     Animation,
+    AudioPlay,
     CachedUpdates,
     DirectLinks,
     DocAcl,
@@ -349,6 +350,7 @@ export class Doc extends RefField {
     @observable public [DocAcl]: { [key: string]: symbol } = {};
     @observable public [DocCss]: number = 0; // incrementer denoting a change to CSS layout
     @observable public [DirectLinks] = new ObservableSet<Doc>();
+    @observable public [AudioPlay]: any; // meant to store sound object from Howl
     @observable public [Animation]: Opt<Doc>;
     @observable public [Highlight]: boolean = false;
     static __Anim(Doc: Doc) {
diff --git a/src/fields/DocSymbols.ts b/src/fields/DocSymbols.ts
index 5b743f710..bb974ee74 100644
--- a/src/fields/DocSymbols.ts
+++ b/src/fields/DocSymbols.ts
@@ -3,6 +3,7 @@ export const Self = Symbol('DocSelf');
 export const SelfProxy = Symbol('DocSelfProxy');
 export const FieldKeys = Symbol('DocFieldKeys');
 export const FieldTuples = Symbol('DocFieldTuples');
+export const AudioPlay = Symbol('DocAudioPlay');
 export const Width = Symbol('DocWidth');
 export const Height = Symbol('DocHeight');
 export const Animation = Symbol('DocAnimation');