
CHAPTER 16. INSTRUMENT AND EFFECT RACKS 212
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.
4. An incoming MIDI note gets compared to a chain's key zone. If the MIDI note lies
within the key zone, it is passed to the next zone for comparison; if it does not,
then we already know that the note will not be passed to that chain's devices.
5. The same comparisons are made for the chain's velocity and chain select zones.
If a note also lies within both of these zones, then it is passed to the input of the
rst device in that chain.
6. The output of all parallel chains is mixed together to produce the MIDI Effect
Rack's nal output. If there happened to be another device following after
the Rack in the track's device chain, it would now receive the Rack's output for
processing.
16.5.2 Key Zones
The Key Zone Editor.
When the Key button is selected, the Key Zone Editor appears to the right of the Chain List,
illustrating how each chain maps to the full MIDI note range (nearly 11 octaves). Chains will
only respond to MIDI notes that lie within their key zone. The zones of individual chains may
occupy any number of keys, allowing for exible keyboard split setups.
Key zone fade ranges attenuate the velocities of notes entering a chain.
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