On Tue, 20 Oct 2020, Amanda Ava Koci Pereira wrote: > Hi guys... > > We need some clues about to downmix 5.1 and 7.1 channels to 2 channels > > for the moment we are using the following code -> > > It works but fails miserably if all channels have data at same time > Is the problem that you get clipping if there is audio on more than one input channel? In general, if you sum a number (N)( of digital channels which have a maximum amplitude of M, then the maximum amplitude of the sum will be N * M. So in this case you need to reduce the output amplitude by 1/N if you want to keep the maximum amplitude of the sum at M. So in your case you need to set > #define AR_K_P_ATTENUATION_LEVEL 1.0 according to the number of channels being downmixed per output channel. /Ricard -- Ricard Wolf Wanderlof ricardw(at)axis.com Axis Communications AB, Lund, Sweden www.axis.com Phone +46 46 272 2016 Fax +46 46 13 61 30
