audio captcha support for blind people

[pravi]

diaspora is using this library and now blind people cannot sign up there.
diaspora/diaspora#5043 (comment)

Adding this feature makes all sites using this library accessible to blind people.

[zealot128]

SimpleCaptcha until now only creates images via imagemagick.

I have no experience with creating an audio captcha. Do you have any ideas on how to create one? Are there any Open Source libraries?

[zealot128]

There seems to be a plugin/fork by @aditya-kapoor with audio support.
https://github.com/aditya-kapoor/simple-captcha-audio

[aditya-kapoor]

@zealot128 @pravi Do let me know if have any questions or doubts. Currently due to constraints of my current work, I am unable to post a demo for the gem..