Hi knob, I've been trying to get to audio sources in your SDK, and I have terrible news so far!
The most important audio functions are precompiled into this file:
RK27XX_EQ_V071228R.a
It's a shame, because SDK for RK260X has these functions kept open source.
look at msaudspapi.h file. There are functions listed connected with processing audio buffer at very last point of decoding data (uploading PCM data to audio digital processor).
You can try changing the arguments of calling these functions. There are interesting values to set like
ms_set_leq_target.
I really hope you'll fix the audio, because I want to buy the player as yours as soon as possible. $43 and free shipping is not big money, you know it's tempting
