I am using GarageBand 11 to record our band with an 8-track digital interface (zoom r16). We have leveled all the channels going into the interface on a mixer. When I record the tracks (8 tracks simultaneously), the level meters in GarageBand (little level meter on the left side of each track) show a normal input, mostly low (=green) and only very rarely going to yellow, but definitely never red. But the master-track still shows a rather high overall level, going mostly into yellow and hitting red quite often, even without any mixing or mastering. I have to turn the single tracks way down to reach a masterlevel that doesnt go into red. If I leave the levels of the single tracks at a "normal" level and then add the masteringtools (1.channel eq, 2.compressor, 3.multipressor, 4.second compressor, 5.limiter) this reults in quite heavy limiting, which leads to audible "pumping" noise.
Why is the mastertrack-level so much higher than the single tracks and why do i have to turn the single tracks to an "unnormal" low level to get decent results?
Thanks for any advice!