45
Getting Started
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The Controllers
The Controllers
Once you pass zero, you enter a range of “negative” Depth values that produce
reverse controller operation: i.e. the output level decreases as you blow harder into the
Breath Controller. Like the normal positive range, the negative Depth range is from “0”
to “-127”.
NOTES ■ Many parameters with any relationship to MIDI control have a range
of values from -127 through 0 to 127 (255 steps). This corresponds to the range
of values that can be represented in binary form by one “byte” (8 bits) of data —
the number MIDI uses to convey control values.
8. Vary the Curve Parameter
You may have noticed in the previous step that the relationship between breath
pressure and output is linear. That is, a change in breath pressure produces a correspond-
ing change in sound. The “Curve” parameter makes it possible to change that relation-
ship. As you increase the curve value (the maximum value is 16), the line on the graph
which represents breath pressure versus output will curve downward, as shown in the
display below (setting “12”). The result is that the lower end of the breath pressure range
has relatively little effect on the sound, while higher breath pressures produce more
dramatic changes.
Negative curve values (0 … -16) have the opposite effect: Output increases rapidly
at low breath pressures while higher pressures produce relatively little effect.