常见问题FAQ
关于声音、版权、数据与设备的高频疑问。The questions we get asked most about sound, licence, data and devices.
这些声音是真实录音还是合成的？Are the sounds real recordings or synthesized?
209 个素材中，真实录音来自 Pixabay 与 Mixkit 两大免版权可商用音源（雨声、海浪、车流、鸟鸣、篝火等），经响度归一与无缝循环处理后由浏览器本地混音；双耳节拍、等时音、呼吸节拍、萨索尔吉频率、彩色噪音与宇宙氛围为本站原创合成波形，同样免费可商用。Real recordings come from Pixabay and Mixkit (rain, waves, traffic, birds, fire…), loudness-normalised and looped seamlessly; binaural beats, isochronic tones, breath pacers, solfeggio frequencies, coloured noise and space drones are original synthesised waveforms.
收费吗？需要注册吗？Is it free? Do I need an account?
完全免费，无需注册。混音、收藏与语言偏好只保存在本机浏览器 localStorage，不会上传到任何服务器；页面展示 Google 广告并用百度统计记录匿名访问量。详见隐私政策。Completely free — no account. Your mixes, favourites and settings live only in your browser. The pages show Google ads and measure traffic anonymously with Baidu Analytics. See the Privacy Policy.
导出的音频可以商用吗？Can I use exported audio commercially?
录音素材基于 Pixabay Content License 或 Mixkit 免版税许可，原创合成波形以 CC0 发布，均可免费商用。逐条署名见「素材来源」页；导出在浏览器本地渲染，不经过服务器。Recordings are under the Pixabay Content License or Mixkit royalty-free license, and original tones are CC0 — all free for commercial use. Per-sound attribution is on the Credits page.
手机上也能用吗？会费流量吗？Does it work on phones? Data usage?
支持。每段录音约 60 秒 / 1MB 左右，只有点开或悬停的音色才会下载，之后由 Service Worker 缓存，重复收听几乎不耗流量。可加入主屏幕当 App 使用。Yes. Each loop is ~60 s / ~1 MB and downloads only when you hover or play it, then gets cached — repeat listening costs no data. Installable as an app.
睡眠定时器到点后会怎样？What happens when the sleep timer ends?
最后 30 秒平滑淡出后自动停止，不会突然静音惊醒；剩余时间会显示在浏览器标签页标题上。醒来了想接着睡，到点提示里可一键「再睡 5 分钟」。The mix fades out over the last 30 seconds so you aren’t jolted awake; remaining time shows in the tab title, and the finish toast offers a one-tap "Snooze 5 min".
为什么有的声音点了要等一下才响？Why does some sound take a moment to start?
首次使用某音色需要下载约 1MB 的录音（带进度显示），之后永久缓存、秒开。把鼠标悬停在音色上会提前预下载，点加即响。The first play downloads the ~1 MB recording (progress shown); afterwards it is cached forever. Hovering a sound pre-loads it so clicking is instant.
支持哪些浏览器？Which browsers are supported?
任何支持 Web Audio 的现代浏览器：Chrome / Edge / Firefox / Safari 的近期版本，桌面与移动端均可。IE 不支持。Any modern browser with Web Audio support: recent Chrome, Edge, Firefox and Safari, desktop and mobile. IE is not supported.
换设备了，我的组合和收藏能同步吗？Can my presets sync across devices?
数据只存在本机浏览器，不提供云同步（这是隐私设计的一部分）。换设备前可用「下载组合 JSON」备份，或用分享链接把混音带过去。Data stays on-device by design — there is no cloud sync. Back up with "Download JSON" or carry a mix via its share link.