As rjlov knows it is possible to modify the waveform as it comes out of the player without the player source code by modifying the kernel. So, even if IASCA trusted empeg to write the checksum code (which they may not do, there's a conflict of interests there - empeg has a lot to gain out of its players winning lots of competitions) and the audio data coming out of the WAV file into the audio device is correct it can still be modified in kernel. All that would be needed is a bit of code to recognise that it is playing an IASCA test track then a map of modifications that should be done to the digital data before it is passed out to the DSP.

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Mike Crowe
I may not be speaking on behalf of empeg above :-)