BF706 ezlite mini input and output data types

Hi, I'm a bit lost right now. I can get the input and output from, let's say, Audio Precision, however, there is something missed.

I sent 1 kHz (100 mVRMS) to the BF706 ezlite mini and after I changed it to long fract or float, I got 0.0003. When I sent back to Audio Precision, it showed 81.2 mVRMS.

What did I miss? Do I have to do scaling rather than using lrbits or bitslr? Here's my code below, please kindly assist me. Thanks a lot.

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