diff --git a/ext/bg/js/audio.js b/ext/bg/js/audio.js
index 972e2b8b..0732e25e 100644
--- a/ext/bg/js/audio.js
+++ b/ext/bg/js/audio.js
@@ -16,7 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-/*global jpIsStringEntirelyKana, audioGetFromSources*/
+/*global jpIsStringEntirelyKana*/
 
 const audioUrlBuilders = new Map([
     ['jpod101', async (definition) => {
@@ -154,7 +154,7 @@ function audioBuildFilename(definition) {
     return null;
 }
 
-async function audioInject(definition, fields, sources, optionsContext) {
+async function audioInject(definition, fields, sources, optionsContext, audioSystem) {
     let usesAudio = false;
     for (const fieldValue of Object.values(fields)) {
         if (fieldValue.includes('{audio}')) {
@@ -171,12 +171,10 @@ async function audioInject(definition, fields, sources, optionsContext) {
         const expressions = definition.expressions;
         const audioSourceDefinition = Array.isArray(expressions) ? expressions[0] : definition;
 
-        const {url} = await audioGetFromSources(audioSourceDefinition, sources, optionsContext, true);
-        if (url !== null) {
-            const filename = audioBuildFilename(audioSourceDefinition);
-            if (filename !== null) {
-                definition.audio = {url, filename};
-            }
+        const {uri} = await audioSystem.getExpressionAudio(audioSourceDefinition, sources, optionsContext, {tts: false});
+        const filename = audioBuildFilename(audioSourceDefinition);
+        if (filename !== null) {
+            definition.audio = {url: uri, filename};
         }
 
         return true;
diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index 04bf240d..abf4c673 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -23,7 +23,7 @@ requestText, requestJson, optionsLoad
 dictConfigured, dictTermsSort, dictEnabledSet, dictNoteFormat
 audioGetUrl, audioInject
 jpConvertReading, jpDistributeFuriganaInflected, jpKatakanaToHiragana
-Translator, AnkiConnect, AnkiNull, Mecab, BackendApiForwarder, JsonSchema, ClipboardMonitor*/
+AudioSystem, Translator, AnkiConnect, AnkiNull, Mecab, BackendApiForwarder, JsonSchema, ClipboardMonitor*/
 
 class Backend {
     constructor() {
@@ -34,6 +34,7 @@ class Backend {
         this.options = null;
         this.optionsSchema = null;
         this.defaultAnkiFieldTemplates = null;
+        this.audioSystem = new AudioSystem();
         this.optionsContext = {
             depth: 0,
             url: window.location.href
@@ -436,7 +437,8 @@ class Backend {
                 definition,
                 options.anki.terms.fields,
                 options.audio.sources,
-                optionsContext
+                optionsContext,
+                this.audioSystem
             );
         }