Specifications

Chapter 69: DINR 339
BNR Contour Line Controls
Learn
Clicking the Learn button creates a noise signa-
ture based on the audio segment currently se-
lected on screen. There are two Learn modes:
Learn First Audio mode and Learn Last Audio
mode.
Learn First Audio Mode Learn First Audio mode
is the default Learn mode. It is designed for use
with audio that has an identifiable noise-only
section that you can locate and pre-select. To
use this mode, locate and select the noise-only
portion of the audio, click the Learn button,
start playback, and BNR will build a noise signa-
ture based on the first 16 milliseconds of audio
playback. First Audio Learn mode can be
thought of as a trigger-learn mode, since noise
capturing is triggered by the first audio that
DINR receives.
Learn Last Audio Mode Learn Last Audio mode
is designed to let you locate and identify a seg-
ment of noise on-the-fly as you listen to audio
playback. In this mode, you first Alt-click (Win-
dows) or Option-click (Mac) the Learn button,
then initiate audio playback. When you hear the
portion of audio that contains the noise you
want to identify and remove, click the Learn
button a second time. BNR will build a noise sig-
nature based on the last 16 milliseconds of audio
playback. The Spectral Graph displays data in
real-time in Learn Last Audio mode.
Fit
The Fit button computes a noise Contour Line
with approximately 30 breakpoints to fit the
shape of the current noise signature. The Con-
tour Line can then be edited to more closely fit
the noise signature or to reduce specific fre-
quency bands by dragging, adding or deleting
breakpoints.
Pressing the Up Arrow or Down Arrow keys on
your computer keyboard lets you raise or lower
the entire Contour Line, or a selected portion of
the Contour Line. The Left/Right arrows lets you
move a selection left or right. To select a portion
of the Contour Line with multiple breakpoints,
Control-drag (Windows) or Command-drag
(Mac) to highlight the desired area.
After you use the Fit function, BNR will auto-
matically boost the entire Contour Line 6 dB
above the noise signature so that all noise com-
ponents of the audio file are below the Contour
Line. You may want to adjust the Contour Line
downwards as needed to modify the character of
the noise reduction.
Super Fit
The Super Fit button creates a noise Contour
Line consisting of over five hundred break-
points in order to follow the shape of the noise
signature more precisely.
Learn button
Fit button
Super Fit button