Android :: How To Disable AGC On HTC EVO (Supersonic)?

I'm working on an application that needs to perform recognition algorithms on raw PCM audio captured from the microphone. On all Android devices I've tested, the PCM data is usable (i.e., raw audio data.) This is not the case for the new Sprint EVO. The Sprint EVO has AGC (Auto Gain Control) on the mic, which destroys the data such that our recognition algorithms no longer work. I believe this is a feature that HTC added to the OS for this device (and possibly future devices.) I've tested our application on a few other devices using the same OS version (2.1) and these other devices behave normally. Unfortunately, HTC has not yet posted the code used on this device. I expect that I may have to use JNI in order to bypass this for this specific device, and I'm willing to do this, but without access to the HTC source, I wouldn't know where to begin. There is no way to reverse the effects of AGC, so I'm stuck trying to work around it.