[LAD] Total and Agerage RMS power calculation

Dear All, I have written a small test application to calculate Average RMS and max RMS power of a wave file. Wave file audio data having 16 bit sample and mono. i'm using the following algorithm : i=N-1 rms = sqrt(1/N ∑ sample[i] * sample[i] ) i=0 AvgRMS = 20.0 * log10 ( rms /2^N-1);// for RMS power in dB. When i compared the AvgRMS value with adobe audition, it matches with Total RMS power instead of Average RMS power but i want to calculate Avg RMS power. Can you advise me where I'm wrong to calculate Average RMS power in dB. Thanks in advance. Best Regards chandrashekhar