Microsoftは7月27日(現地時間)、Windows 11のWindows Insider ProgramのExperimental (Future Platforms)チャンネル向けの最新ビルド「Windows 11 Insider Preview Build 29634.1000」をリリースしました(リリースノート)。Experimental (Future Platforms)チャンネルで公開されるビルドは、将来のWindowsのプラットフォームに関わる、さまざまな新機能が先行して実装されています。プレビューチャンネルの中で最も不安定な可能性があり、提供されるドキュメントも限定的なものとなっています(例えば既知の不具合は掲載されないなど)。Windows Insider Programの更新オプションでExperimental (Future Platforms)チャンネルを選択し、Windows 11のプレビュー版を使用しているユーザーは、Windows Updateを利用して最新版に更新することができます。Build 29634.1000の新機能Build 29634.1000では、Voice Access(音声アクセス)に「Voice Isolation」機能が追加されています。周囲に人がいるオフィスや家庭内でも、自分の声だけを認識してくれる機能で、誤認識が大幅に減ることが期待されます。またアクセシビリティ面では、HID標準の点字ディスプレイをUSB接続するだけで即利用可能になるという改善が行われています。アカウント管理フライアウトがモダンなデザインに刷新され、サブスクリプションの状態や特典がひと目で分かるUIになりました。リリースノートは以下の通りです。[Certificate renewal for Windows Insiders]This build includes the renewed Windows Insider flight certificate. Windows Insider Preview builds use flight certificates that are renewed periodically to help ensure Insider devices remain on supported builds and continue receiving future Insider Preview updates. The current flight certificate expires on August 11, 2026, so please update your device to this build or later containing the renewed flight certificate before that date.For more information, see aka.ms/WIPCertExpiry.[Voice isolation in Voice Access]We're introducing Voice Isolation, a new option in Voice Access that helps it focus on your voice, even when others are speaking nearby. Whether you're in a shared office, an open floor plan, or at home with family around, Voice Isolation filters out other voices and background noise so Voice Access can better understand you. All processing happens privately on your device.Getting startedVoice Access now offers three speech recognition modes under Voice Access settings > Improve speech recognition:Voice Isolation: Filters out other speakers and background noise (one-time voice setup required).Remove background noise only: Filters out non-speech sounds like typing or door slams. No additional setup needed.No filtering: Default microphone input with no additional processing.To set up Voice Isolation, select it from the menu and follow the short, guided setup where you'll read a brief paragraph aloud so Voice Access can learn your voice. It only takes a minute, and your voice data never leaves your device. Screenshot showing where the voice isolation setting can be found. Screenshot showing voice isolation setup.[Narrator]Braille displays now connect instantly with NarratorWe're making refreshable braille displays easier to use in Windows. Narrator now supports displays that use the HID standard, an open industry standard for braille displays. If your display supports HID, simply connect it via USB and start reading with no additional setup required. For Bluetooth, pair your HID braille display in Settings > Bluetooth & devices like any other accessory, and you can work wirelessly without being tethered to your PC.Compatible HID displays include models like the Orbit Reader 20, Orbit Slate 340, Freedom Scientific Focus 40, and APH Mantis Q40.HID braille displays now work during the initial Windows setup experience (OOBE) over USB, meaning users who are deaf-blind can set up their PC independently from the first screen. You can customize braille input and output options anytime in Settings > Accessibility > Narrator > Braille.[Account control]The Windows 11 Account Control flyout has a refreshed, modern design and a clear subscription badge to make account status instantly visible. This helps users identify their plan, discover benefits, and explore upgrades. UI showing the refreshed Account Control flyout with subscription badges, account benefits, and storage details.Feedback: Share your thoughts in Feedback Hub (WIN + F) under Settings > Start Menu.[Input]The emoji panel (Windows key + period (.)) now uses GIPHY as the GIF provider, delivering a smoother GIF browsing and sharing experience following the deprecation of the Tenor API.[Settings]Improved reliability of navigating to the Startup apps page in Settings.[Taskbar]Improved reliability of loading the system tray area of the taskbar when using your PC in a tablet posture.[Start menu]Improved reliability of Start menu view preferences, ensuring your selected view is retained.Improved keyboard navigation when keyboard focus is set to the apps list within Start menu.[Date and time]Improved detection for triggering time zone change notifications.[Display and graphics]Improves the reliability of rendering content while scrolling for certain apps spanning across multiple monitors.リリースノートには細かな変更内容がリストアップされていますので、インストールする前に確認することをおすすめします。