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保留声音。",{"q":66,"a":67},"录完之后还能改吗？","能。在编辑器里打开它：挪音符、改时值、删掉弹错的、补上漏掉的、对齐到拍子，或者整体移调。保存修改和其他保存一样，要用积分。",{"q":69,"a":70},"能在一个乐器上面再叠录另一个吗？","能。在编辑器里打开片段，把光标放到新声部开始的位置，按录音。片段会一边播放一边让你弹，新弹的音符直接加进去，原来的音符不动。",{"q":72,"a":73},"弹的东西能变成乐谱吗？","能。先保存片段，再导出 PDF 或 MusicXML 格式的乐谱。音符会对齐到八分或十六分音符并分好小节，所以弹得越齐，乐谱越干净。",{"q":75,"a":76},"为什么会有一点点延迟？","浏览器会带来几毫秒的音频延迟。用有线耳机会好些，蓝牙耳机延迟最大。",{"q":78,"a":79},"iPhone 上没声音？","先随便点一下琴键或鼓垫，把声音唤醒，再把音量调大。就算开着静音键，JotJam 也能出声。",{"q":81,"a":82},"一段最长能录多久？","最长 10 分钟。到时间会自动停止，录好的片段会留在列表里。",{"q":84,"a":85},"免费吗？","弹奏和录音都免费，也不用注册。把片段保存到账号会用几个积分，每天登录都送免费积分。",{"left":4,"top":4,"width":5,"height":5,"rotate":4,"vFlip":6,"hFlip":6,"body":87},"\u003Cpath fill=\"none\" stroke=\"currentColor\" stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M3 17a3 3 0 1 0 6 0a3 3 0 0 0-6 0m6 0V4h10v8M9 8h10m-3 11h6m-3-3v6\"\u002F>",1792672096562]