User's Manual

290 Instrument, Drum and Effect Racks
zones, which are discussed next, and is quite helpful when troubleshooting complex configura-
tions.
18.5 Zones
Zones are sets of data filters that reside at the input of every chain in an Instrument or Effect
Rack. Together, they determine the range of values that can pass through to the device chain.
By default, zones behave transparently, never requiring your attention. They can be reconfig-
ured, however, to form sophisticated control setups. The three types of zones, whose editors are
toggled with the buttons above the Chain List, are Key, Velocity, and Chain Select. The adjacent
Hide button whisks them out of sight.
Note: Audio Effect Racks do not have key or velocity zones, since these two zone types filter
MIDI data only. Likewise, Drum Racks have no zones at all; they filter MIDI notes based on
choosers in their chain lists.
Zones contain a lower, main section, used for resizing and moving the zone itself, and a narrow
upper section that defines fade ranges. Resizing of either section is done by clicking and drag-
ging on its right or left edges, while moving is accomplished by clicking and dragging a zone
from anywhere except its edges.
18.5.1 Signal Flow through Zones
To understand how zones work, let’s examine the signal flow in a MIDI Effect Rack. Our MIDI
Effect Rack resides in the device chain of a MIDI track, and therefore processes MIDI signals.
We will assume that it contains four parallel device chains, each containing one MIDI effect.
1. All MIDI data in the track is passed to its device chain, and therefore into the input of the
MIDI Effect Rack.
2. Our MIDI Effect Rack has four device chains, all of which receive the same MIDI data at
the same time.
3. Before any MIDI data can enter a device chain, it must be able to pass through every zone
in that chain. Every chain in a MIDI Effect Rack has three zones: a key zone, a velocity
zone and a chain select zone.