Live CD
The Live C supports all kinds of accessibility features
There is a [https://wiki.ubuntu.com/Accessibility/doc/StartGuide start guide] about accessibility on ubuntu (though a bit outdated as I'm writing this).
High Contrast
To enable Hight contrast, at the boot prompt, press F5, then two times arrow-down, then twice enter.
Magnification
To enable magnification, at the boot prompt, press F5, then two times arrow-down, then twice enter.
Speech Synthesis
To enable speech, at the boot prompt, press F5, then three times arrow-down, then twice enter.
Braille
The alternate CD automatically detects USB braille devices. For serial/bluetooth devices, press F6 and type (qwerty keyboard!)
brltty=driver,device,table
see brltty for more details.
Alternatively, at boot prompt, press F5, then four times arrow-down, then twice enter. You will be (visually) prompted for braille configuration.
Alternate CD
The alternate CD only supports braille.
The alternate CD automatically detects USB braille devices. For serial/bluetooth devices, press F6 and type (qwerty keyboard!)
brltty=driver,device,table
where driver, device, and table should be filed like with debian.
Installation then proceeds as usual.