yeah my mate has that A+H mixer and it blew me away when i first used it - the filter is awesome for "morphing" between tracks, you can lowpass one track out whilst fading the next in, raising the filter to create a cool transition on tracks, some cool effects can be had by cutting the filter in in time with the track too......a wicked mixer but a bitch when the gig i played after playing on it was a 2 channel "made 2 fade" type jobby!!