hi, 

you can calculate like below:

example:

volalpha = 3ms

sr=48k

constant value e = 2.718....

linearval= 1-math.pow(e, -1/(sr*(volAlpha/1000))) = 0.00692

math.round(linearval * 2^31) = 14861419

transfer it to Hex, it equals to E2C468. just as the ppc3...

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