No HDMI in my classroom, how will I airplay mirror?

The sound of airplay mirroring is awesome, however it only works with Apple TV 2g. No problem, I'm happy to unplug my ATV and take it with me, but when I get to the classroom, none of the projectors in the rooms I work in have got HDMI! Is there an app that will emulate ATV or cable that converts HDMI to VGA? and what if I find I need sound too?
Martyn

rccharles wrote:
There are hdmi to vga converters.  I have not tried one.  I've heard rumors that hdmi had security to prevent copyright abuse.  Don't know how this would work with VGA since converting to vga would be a hole in security.
What you're referring to is High-bandwidth Digital Copy Protection (HDCP) which was to prevent high quality digital-to-digital copying.  If the devices along the way aren't HDCP compliant, then the source device has the option to switch to a lower quality mode.  VGA, being a much lower quality analog signal, is allowed by the HDCP specs.  The idea was to prevent someone from attaching a digital cable between a Blu-ray player and a Blu-ray recorder and get a "perfect digital copy" very easily.  Attaching a VHS recorder to a Blu-ray player, one can still "bypass" the HDCP copy protection, but you'd also only get VHS quality rather than Blu-ray quality.  So it goes with down-converting from HDMI to VGA.
That said, the adapter may still not work if there is no "lower quality" available from the source device.  While that would be likely with something like Netflix or iTunes content, I do not know if Apple does anything with iPad screen mirroring.

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