getEnhancedMicrophone() doesn't work (reduce echo) on air mobile for IOS

 

I have a problem with my flex mobile application on iOS. It is a video chat application with a red5 server.

The video works fine but the voice has a big echo! I tried using getEnhancedMicrophone() but it didn't help.

How can I have Acoustic Echo cancellation or suppression on IOS?

I work on Flash Builder 4.6 with Air 3.5

There no known solutions.

Adobe been promising a fix for years but the solution requires access to Android source code from Google that is not open source. I had the same issues with a videChat app on Android using Adobe Air. I tried as workaround:

  • Switching mic.setLoopback(false/true) in a timer to break up the audio
  • Trying to detect sound coming over NetStream and set the local device mic gain to 0 Problem is I cannot detect if someone is talking over NetStream.
  • Use NetStreamInfo audio properties like audioBytesPerSecond but these do not jump when someone is talking over NetStream.
  • The problem is solved if the user wears headphones on the mobile side but this is not acceptable.
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