选择文件适合快速加入一首或少量音乐；选择文件夹会建立一个曲库入口并扫描其中的音频。是否继续扫描子文件夹由导入区的“包含子文件夹”选项决定。不同浏览器提供的文件夹能力不同，支持 File System Access API的浏览器以文件夹打开方可解锁完整体验。功能受限时仍可退回临时播放。

文件访问权限由浏览器保存和恢复，而不是由播放器绕过系统长期持有。重启浏览器、使用隐私模式、清理站点数据、浏览器策略变化，或移动和重命名文件夹，都可能让原授权失效。重新选择同一目录只是恢复访问关系，不会复制或上传目录内容。

不会因为“选择文件”或“选择文件夹”而自动上传。本地音频由浏览器直接读取并播放。在线媒体、在线歌词或其他网络来源可能各自发起网络请求，但这与本地导入是不同的数据路径。

扩展名只说明文件声称的格式，真正能否播放还取决于音频编码、文件是否损坏，以及当前浏览器和系统提供的解码器。同一种容器也可能装入不同编码。可以先查看兼容性检测的格式声明，再用其他已知正常的音频交叉验证。

歌单、设置、文件句柄与离线资源都可能保存在浏览器的站点存储中。清理站点数据、重装浏览器配置或使用临时会话，可能一并删除这些资料。重要歌单与配置应定期从设置页的本地数据区域导出备份；备份不包含原始音乐文件。

受Chromium系浏览器API限制，缺乏细粒度获取输出设备的API。只能一次性请求包含麦克风的全部音频权限来取得可辨认的输出设备列表。MiuPlayer Box 只用这一步解锁设备枚举，取得结果后会立即停止临时音频轨道，不使用麦克风。Firefox浏览器上则不需申请麦克风。

不一定。安装只表示应用可以像独立窗口一样启动；离线可用还依赖 Service Worker 是否控制当前页面、所需资源是否已经缓存，以及缓存是否被系统回收。首次使用或版本切换后，可关闭应用重新后再次打开确认离线资源状态。

歌词来源可能依赖文件内嵌信息、同名歌词或在线匹配；不完整的标题、艺人和时长会降低匹配准确度。先检查音乐元数据和歌词来源，再手动替换或校正歌词。逐词时间轴本身有误时，需要在歌词工具中重新调整。

不会。转换器只处理你粘贴到页面中的文本，并把结果显示在输出区；除非你主动复制并覆盖自己的文件，否则原文件不会被写入或替换；
若需要自动化批量转换，可使用LRC to LRCX服务的高级转换模式。

“自动展开/收缩”控制队列面板是否响应右侧边缘；收缩后的按钮自动隐藏是另一套保持界面整洁的逻辑，即使关闭自动展开/收缩也仍会生效。把鼠标移到右侧或在移动端轻触按钮附近可再次唤出按钮。手动点击按钮后，自动行为会暂停十秒，优先保留你的选择。若不喜欢，选项中可在关闭该行为。

“可用”表示当前环境暴露了预期能力或已确认相应状态；“受限”表示存在回退方案、尚未获得持久状态，或只能确认 API 入口；“不可用”表示当前快照没有发现所需入口。检测不会主动申请权限，也不能保证每个文件、设备和系统策略都成功，仍需结合实际操作判断。

Choosing files is useful for adding one track or a small selection quickly. Choosing a folder creates a library entry and scans it for audio. The “include subfolders” option decides whether that scan continues into nested folders. Folder capabilities differ between browsers, so a limited environment can still fall back to selecting individual files.

The browser stores and restores file permissions; the player cannot bypass the system and keep permanent access by itself. Restarting the browser, using a private session, clearing site data, changing browser policy, or moving or renaming the folder can invalidate a previous grant. Selecting the same folder again only restores that relationship—it does not copy or upload its contents.

No upload happens automatically when you choose files or a folder. The browser reads and plays local audio directly. Online media, online lyrics, or other network providers may make their own requests, but those use a different data path from local import.

A filename extension only says what the file claims to contain. Playback also depends on the audio codec, file integrity, and the decoders supplied by the browser and operating system. The same container can hold different codecs. Check the format declarations on the compatibility page, then compare with another file that is known to work.

Playlists, settings, file handles, and offline resources may all live in browser site storage. Clearing that storage, rebuilding a browser profile, or using a temporary session can remove them together. Export important playlists and configuration regularly from the Local Data area in Settings. A backup does not include the original music files.

Some browsers hide audio-device names until media permission has been granted, so the player may request audio access once to obtain a recognizable output-device list. MiuPlayer Box uses this step only to unlock device enumeration and immediately stops the temporary audio tracks afterward; it is not intended to record. You can decline, but device names or switching may remain limited.

No. Installation means the app can launch in its own window. Offline use also depends on whether a Service Worker controls the page, whether required resources have already been cached, and whether the system has reclaimed that cache. After first use or a version change, open the app online once and check its offline-resource state.

Lyrics may come from embedded metadata, a matching local lyric, or an online match. Incomplete title, artist, and duration data reduces matching accuracy. Check the track metadata and lyric source first, then replace or correct the lyric manually. If word-level timing is wrong, adjust it with the lyric tools.

No. The converter only processes text pasted into the page and shows the result in its output area. Your original file is not written or replaced unless you deliberately copy the result and overwrite it yourself.

Automatic expand and collapse controls whether the queue panel responds to the right edge. Hiding the button after the panel collapses is a separate tidiness behavior and remains active even if panel automation is disabled. Move the pointer to the right edge, or tap near the button on a touch device, to reveal it again. After you click the button manually, automatic behavior pauses for ten seconds so your choice takes priority.

“Available” means the expected capability is exposed or its relevant state was confirmed. “Limited” means a fallback exists, persistence has not been granted, or only the API entry point can be confirmed. “Unavailable” means the current snapshot did not find the required entry point. The check never requests permission and cannot account for every file, device, or system policy, so confirm the result with the real task.