At the bottom and to the right of the Frequency monitor you find a fre- Fader dB scale
quency and a dB value scale. For better overview. these two scales have
The dB scale to the right of the filter bank lets you control the level re-
intentionally been designed as rough indicators. You can use the mouse
duction or increase that you set for the frequency range controlled by
to find out about exact frequency and dB values. If you move the mouse
the active fader. You can-make settings between +l5dB and -15dB.
cursor over the Frequency monitor, the frequency and dB values corre-
sponding to the current mouse position are displayed in the two fieIds in
the top right corner of the FreeFilter window. The highest possible fre-
quency that can be displayed in the Frequency monitor depends on what Global section
settings you have made in the Global section at the bottom of the Free-
This section at the bottom of the FreeFilter window holds a button and
Filter window. If you selected linear filtering, then the highest frequency
a number of switches that have a global impact on FreeFilter.
is always exactly half the sampling frequency. For an audio tile that was
sampled with 44.1 kHz this would be 22050 Hz. If you select logarith-
mic filtering. then the highest possible frequency displayable is 24 kHz.
Faders
You find the fader section directly below the Frequency monitor. It con-
tains 30 faders that control the settings for the filter bank. If you select
logarithmic filtering in the Global section at the bottom of the FreeFilter
window, the filter bank consists of 30 one-third-octave filters. If you se- Reset button
lect linear filtering. a frequency band section of equal width is assigned
to each filter. Given a sampling frequency of 44.1 kHz and considering If you click on Reset, all FreeFilter faders are reset to the neutral de-
the resulting frequency bandwidth of 0 to 22050 Hz. each fader would fauIt value of 0 dB. where no frequency range manipulations are tak-
influence a frequency band section with a width of ca. 700 Hz. ing place. Additionally. all data acquired using the “Learn” function
will be lost, unless you have saved it before. The “Learn” function is
described in the following chapter.
Freeze switch
Using this switch you can freeze all displays in the FreeFilter window
and-by clicking on it a second time-make them active again. This is
of advantage if you wish to take time to examine a certain part within
You can change the fader positions by dragging the fader handles with the the audio file and the influence that the filter has on it. Please note that
mouse. An active fader is indicated by a highlighted “LED”above it. audio playback is not frozen, as it is handled by your framework appli-
cation program.
* If you click on a fader using the right mouse button, a small information
strip pops up, informing you about fader number, fader frequency range
and middle frequency value.
FREEFlLTER FREEFILTER
English - 22 The FreeFilter window The FreeFiltcr window English - 23
