David, > Hmm, Alexander is probably correct. Then maybe it would be better to > fill with aux channels instead, e g, for 10 channels, change: > > > channel-map = > front-left,front-right,rear-left,rear-right,front-center,lfe,side-left,side-right,aux0,aux1 > > to: > > channel-map = front-left,front-right,aux0,aux1,aux2,aux3,aux4,aux5,aux6,aux7 Yes. It works what I expected. Any PCM samples are not delivered to the 'aux*' channels. But considering about Alexander's comment, it may be better that PCM samples are delivered to all of channels. Are there any differences between profiles with 'aux' and without 'aux'? Thanks Takashi Sakamoto o-takashi at sakamocchi.jp