BLUE SKY AUDIO MANAGEMENT CONTROLLER Manual page 23

and HPBW4.
Normally these filters are used, when using bass management where you don't want the signal
sent to the subwoofer to go down to 20 Hz.
For example, if you're doing editorial work on a soundtrack that is being mixed for a theatrical
release, a bass managed system mix can result in too little bass when played back on the
theatrical system. This is because front speakers in a theatrical system typically only go down to 40
Hz.
So to get better a translation, you could employ a 40 Hz HP2 or HPBW4 high pass filter on the left,
center, and right channels.
The same holds true for surround speakers. In a typical theater setup the surrounds typically do
not go down below 60 Hz. Again to get better translatability you may employ a 60 Hz high pass
filter on the surround channels.
The AMC system also includes a high pass filter for the each channel.
These filters are not in the subwoofer feeds but on the individual channels. The choices are
Bypass, HP2 or HPBW4.
The bypass setting is used when you're not using bass management.
HP2 or HPBW4 are used depending on the actual speaker attached to the channel. If the speaker
is made for bass management, (IE Blue Sky SAT6D) then you use a HP2 set to 80 Hz. If however,
if the attached speaker is a full range monitor that may go down to 50 or 40 Hz, you'd use a
HPBW4 to get a better blend with the subwoofer.
Bass Management on/off - turns bass management on and off. When bass management is OFF,
all crossovers are disabled except for the LFE filter. When in this mode, none of the filters on the
screen can be modified which is indicated in red. To modify any of the filter settings make sure
bass management is turned ON.
Grey Preset buttons The gray buttons along the bottom of the bass management screen are
presets for common bass management setups. Note: these presets only affect values on the base
management screen and do not program the cross mixer.
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