Specifications

Chapter 8: DINR 65
unique because it operates only on the signal,
not on any remaining noise. The Freq slider
controls the center frequency of the filter. Val-
ues range from 20 Hz to 22 kHz.
The Gain slider controls the gain of the filter.
Values range from –12 dB to +6 dB. The High-
Shelf EQ can be enabled and disabled by clicking
the Enable button.
You can also use the High-Shelf EQ to reduce the
amount of high frequencies in a signal. This is
particularly useful if you are working with older
recordings that are band-limited, since the high
frequency content in these is probably made up
of noise and not signal.
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 allow you to locate and identify a
segment of noise on-the-fly as you listen to au-
dio playback. In this mode, you first Option-
click (Macintosh) or Alt-click (Windows) the
Learn button, then initiate audio playback.
When you hear the portion of audio that con-
tains the noise you want to identify and remove,
click the Learn button a second time. BNR will
build a noise signature based on the last 16 mil-
liseconds 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 allows you to raise or
lower the entire Contour Line, or a selected por-
tion of the Contour Line. The Left/Right arrows
allow you to move a selection left or right. To se-
lect a portion of the Contour Line with multiple
breakpoints, Command-drag (Macintosh) or
Control-drag (Windows) to highlight the de-
sired area.
High-Shelf EQ
Learn
Fit