Rock Lock App for Android
'A simple, eyes-free music player for Android.
All controls are based on the Eyes-Free stroke dialer.
You can set Rock Lock as a pre-lock screen for your device to enable quick access to your music collection.
If pre-lock is enabled & you have a lock pattern, Rock Lock will appear before you unlock your device.'
This app would be very helpful to visually impaired individuals.
This is a free app