It's probably a bit "pie in the sky" for the Community Forums (mainly attended by customers and cisco partners) - your request would be best submitted as a Feature Request through your local Cisco Account Team for consideration in a future software update.
Alternately, if you want to implement something yourself a lot quicker - you can do all your audio ins and outs via an external Audio DSP which can be configured on a much higher level than you can do on a simple VC Codec.
Wayne
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