Checkpoint 1.14 - Flash
The volume is adjustable
WCAG 1.0 Priority 2
WCAG Guideline 6. Ensure that pages featuring new technologies transform gracefully.
Music and audio from a Flash movie can seriously interfere with normal screen reader functionality. It can also prove to be a destraction for users with cognitive disabilities.
Therefore giving users control over the audio volume and allowing them to stop the audio altogether is a very important accessibility consideration.
All music and audio volume of Flash content must be adjustable and can be stopped.
Consider providing keyboard controls to manage audio playback.
Browse through the Flash content to ensure user control over audio playback is present and is functional.
The original source of this information is located on the W3C web site (www.w3.org/TR/WCAG10-TECHS/#tech-fallback-page)