Build 10074 is famous for reintroducing Aero Glass (transparency) as a hidden feature. With visual transparency comes an expectation of audio transparency—sounds that feel "light" and "airy."

Windows 10 Insider Preview build 10074 was an early Technical Preview build released during the development cycle of the original Windows 10. Sound behavior in preview builds often differed from final releases because of driver maturity, changes in audio APIs, and default system settings. This post covers how audio worked in build 10074, common issues users experienced, and practical, actionable tips for troubleshooting and improving sound on that specific build. Where helpful, steps are prescriptive and assume a single-machine local setup.

: Build 10074 didn't just change the audio files; it also introduced a new volume control UI

Windows 10 Build 10074, released in April 2015, introduced a refreshed, "softer" set of default system sounds and a new horizontal volume control to align with a modernized, flat design language. This build featured unique "intermediary" audio files, often referred to as "Gumball," which were subsequently tweaked in later versions. For more details, visit Windows Insider Blog SoundCloud Windows 10 Build 10074 Sounds - Stream Gumball - SoundCloud

Whether you're looking to relive that specific era or want to apply those unique sound files to your current setup, here is how you can manage system sounds in Windows. The Sound of Build 10074

: For more granular control over system volume, you can use the command sndvol.exe in the Run dialog ( ) to open the classic Volume Mixer. Windows 10 build 10074 - BetaWiki

Stability and bugs