Thanks for the Reply, but it doesn't help, also the following setting is wrong hw.snd.default_unit=4 I don't have a pcm4 On Sat, 20 Jun 2015 00:48:27 +0200, Denis D via freebsd-questions stated: /> > /> >See if this makes any difference. > >/etc/sysctl.conf > > hw.snd.default_unit=4 > hw.snd.maxautovchans=4 > dev.pcm.0.play.vchans=4 > >-- >Jerry