diff --git a/.changeset/pink-ducks-think.md b/.changeset/pink-ducks-think.md
new file mode 100644
index 0000000000..5c37e4b03e
--- /dev/null
+++ b/.changeset/pink-ducks-think.md
@@ -0,0 +1,5 @@
+---
+"@jspsych/plugin-html-audio-response": patch
+---
+
+uses mimetype of audio recorded for playback instead of defaulting to webm
diff --git a/packages/plugin-html-audio-response/src/index.ts b/packages/plugin-html-audio-response/src/index.ts
index a5205ecec5..5071985e83 100644
--- a/packages/plugin-html-audio-response/src/index.ts
+++ b/packages/plugin-html-audio-response/src/index.ts
@@ -182,7 +182,7 @@ class HtmlAudioResponsePlugin implements JsPsychPlugin<Info> {
     };
 
     this.stop_event_handler = () => {
-      const data = new Blob(this.recorded_data_chunks, { type: "audio/webm" });
+      const data = new Blob(this.recorded_data_chunks, { type: this.recorded_data_chunks[0].type });
       this.audio_url = URL.createObjectURL(data);
       const reader = new FileReader();
       reader.addEventListener("load", () => {