Hello,
I am very old Actionscript developer since 2008. Please check my reviews and feedback for further references. These days I am mainly converting browser based Flash application to Html5.
Regarding the project, a month ago, I have fixed the microphone issue for my old client that is now apparent on new version of IOS. Are you using Adobe SDK or Harmans SDK for compiling the project ? This one is something I am sure however I am not sure about the sound skipping issue. Need to see the code.
Let me know if you have any questions.
Thanks