Text and Images from Slide

• PDF is the most widely used alternate format, and the least accessible.
• PDF was never designed for accessibility.
• TTS requires a lot of hand tagging.
• DRM interference.
• Competing TTS solutions.
• Use built-in readers (Read Aloud, VoiceOver, TalkBack, Narrator).
• Use screen readers (JAWS, NVDA, Read and Write Gold).
• Current mainstream readers are limited in function.
• No support for MathML, much less chemistry.
• Little support for EPUB3.
• Adobe Digital Editions doesn't support TTS.
• Kindles don't support alt text or TTS (mostly).

More external barriers