Volume control

Provide an option to enable the user to adjust the volume.

Users may not be able to hear or distinguish sounds at certain volumes, so they need the ability to adjust the volume. A user that is hard of hearing can have difficulty hearing auditory output and needs to adjust the volume so they can hear the warnings and messages. A user with a vision impairment may depend on speech output and will need to adjust the volume to accommodate different environmental conditions.

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The following techniques are the minimum required to meet Checkpoint 3.3 from the IBM Java Accessibility Checklist:

• Respect the system volume settings. On Windows, the volume is controlled by selecting Start - Programs - Accessories - Entertainment - Volume Control. Or respond to system volume settings in your application, use JNI and a dynamic link library (dll) or system object (so) to access system volume settings. Applications on the Windows platform that play sounds by calling PlaySound and specifying a registry-based sound event may not require additional work.
• Provide volume control in the software. This may require using the Java Media Frameworks standard extension.

Test the software to ensure that it complies with accessibility requirements.

• Tools for testing this checkpoint
• Windows techniques for testing this checkpoint

Tools

There are no test tools required to test this checkpoint.

Windows techniques

The following techniques are required to verify this checkpoint: