diff --git a/tool_core.js b/tool_core.js
index 96ff142..f8061de 100644
--- a/tool_core.js
+++ b/tool_core.js
@@ -332,7 +332,11 @@ module.exports = {
   // 返回新的数组
   filter_story (story) {
     if (Array.isArray(story) && story.length) {
-      return story.filter((section) => Object.values(section || {}).some((val) => !this.is_empty(val))) // (section.text || section.image || section.video)?.trim?.()
+      // section can contain property '_xxx' which shall not change filter result.
+      return story.filter((section) => {
+        if (!section) return false
+        return Object.entries(section).some(([key, val]) => !key.startsWith('_') && !this.is_empty(val))
+      })
     } else {
       return []
     }
@@ -354,7 +358,7 @@ module.exports = {
   summarize_story (story = []) {
     // story is an array of objects, each object could either be {text:'some string'}, {image: url} or {video:url}. Please construct a summary object as result: { textLength, imageCount, VideoCount }
     return story.reduce(
-      (summary, { text, image, video, file, linkTarget } = {}) => {
+      (summary, { text, image, video, audio, file, linkTarget } = {}) => {
         if (text) {
           summary.textLength += text.length
           summary.wordCount += text.split(/\s+/).length
@@ -362,6 +366,8 @@ module.exports = {
           summary.imageCount++
         } else if (video) {
           summary.videoCount++
+        } else if (audio) {
+          summary.audioCount++
         } else if (file) {
           summary.fileCount++
         } else if (linkTarget) {
@@ -371,7 +377,7 @@ module.exports = {
         }
         return summary
       },
-      { textLength: 0, wordCount: 0, imageCount: 0, videoCount: 0, fileCount: 0, linkCount: 0, untypeCount: 0 }
+      { textLength: 0, wordCount: 0, imageCount: 0, videoCount: 0, audioCount: 0, fileCount: 0, linkCount: 0, untypeCount: 0 }
     )
   },
 
diff --git a/tool_uniapp.js b/tool_uniapp.js
index 8a02484..c23f47b 100644
--- a/tool_uniapp.js
+++ b/tool_uniapp.js
@@ -39,15 +39,19 @@ module.exports = {
 
   is_text_file (fileName = '') {
     const ext = /\./.test(fileName) ? fileName.split('.').pop().toLowerCase() : ''
-    return (wo.envar.textExtensionList || ['txt', 'text']).includes(ext)
+    return wo.envar.textExtensionList?.includes?.(ext)
   },
   is_image_file (fileName = '') {
     const ext = /\./.test(fileName) ? fileName.split('.').pop().toLowerCase() : ''
-    return (wo.envar.imageExtensionList || ['jpg', 'jpeg', 'png', 'gif', 'webp', 'image']).includes(ext)
+    return wo.envar.imageExtensionList?.includes?.(ext)
   },
   is_video_file (fileName = '') {
     const ext = /\./.test(fileName) ? fileName.split('.').pop().toLowerCase() : ''
-    return (wo.envar.videoExtensionList || ['avi', 'mp4', 'mov', 'wmv', 'video']).includes(ext)
+    return wo.envar.videoExtensionList?.includes?.(ext)
+  },
+  is_audio_file (fileName = '') {
+    const ext = /\./.test(fileName) ? fileName.split('.').pop().toLowerCase() : ''
+    return wo.envar.audioExtensionList?.includes?.(ext)
   },
 
   thisPage () {
@@ -343,7 +347,13 @@ module.exports = {
       filePath = fileDragged.filePath
       filePicked = fileDragged
       if (!mediaType) {
-        mediaType = this.is_image_file(fileDragged.name) ? 'image' : this.is_video_file(fileDragged.name) ? 'video' : 'file'
+        mediaType = this.is_image_file(fileDragged.name)
+          ? 'image'
+          : this.is_video_file(fileDragged.name)
+          ? 'video'
+          : this.is_audio_file(fileDragged.name)
+          ? 'audio'
+          : 'file'
       }
     } else if (mediaType === 'image') {
       let [errorChoose, { tempFilePaths, tempFiles } = {}] = await uni.chooseImage({ count, sizeType, sourceType })
@@ -367,6 +377,27 @@ module.exports = {
       fileSize = size
       filePicked = tempFile
       filePath = tempFilePath
+    } else if (mediaType === 'audio') {
+      // #ifdef WEB
+      // https://uniapp.dcloud.net.cn/api/media/file.html
+      let [errorChoose, { tempFilePaths, tempFiles } = {}] = await uni.chooseFile({
+        count,
+        extension: wo.envar.audioExtensionList,
+        type: undefined,
+      }) // 20240429 但是测试下来 extension 参数无效
+      if (errorChoose) {
+        return {
+          _state: 'CER_FAIL_CHOOSE',
+          _msg: '', // { zhCN: '文件选择失败。请稍后再试，或向客服投诉。', enUS: 'File choose failed. Please try again later, or report to customer service.' },
+        }
+      }
+      fileSize = tempFiles?.[0]?.size
+      filePicked = tempFiles?.[0]
+      filePath = tempFilePaths?.[0]
+      // #endif
+      // #ifndef WEB
+      return { _state: 'UNSUPPORTED_FILETYPE', _msg: { zhCN: '请切换到网页端上传文件！', enUS: 'Please switch to WebApp to upload files.' } }
+      // #endif
     } else {
       // #ifdef WEB
       // https://uniapp.dcloud.net.cn/api/media/file.html