10.6

Table Of Contents
228Logic Pro Instruments
Change the Logic Pro ES2 filter configuration
The Filter Configuration button lets you switch between a parallel and series filter routing.
When either is chosen, the entire circular filter element rotates, and the positions and
direction of the filter controls clearly indicate the signal flow. The button name also
changes in each mode.
In the figure to the left, the filters are cabled in series. This means that the signal of all
oscillators (combined at the Oscillator Mix Triangle) passes through the first filter, then this
filtered signal passes through Filter2, if Filter Blend is set to 0, the middle position. The
output signal of Filter2 is then sent to the input of the dynamic stage (Amplifier section).
In the figure to the right, the filters are cabled in parallel. If Filter Blend is set to 0, you’ll
hear a 50/50 mix of the source signal, routed via Filter1 and Filter2. The output signals
of the two filters are then sent to the input of the dynamic stage. See Crossfade between
Logic Pro ES2 filters.
Crossfade between Logic Pro ES2 filters
Filter Blend can have a significant effect on the ES2 signal flow. Regardless of whether
parallel or series filter configurations are chosen, a Filter Blend setting of −1 results in only
Filter1 being audible. A Filter Blend setting of +1 limits audibility to Filter2. The figures
illustrate the signal flow between the Oscillator Mix stage (the Triangle) and the dynamic
stage (the Amplifier). The signal flow through the filters and the filter overdrive circuit (the
Drive parameter) are dependent on the Filter Blend setting.
Filter Blend:Series filter configuration information
Use positive values for Filter Blend to partially bypass Filter1.
Use negative values for Filter Blend to partially bypass Filter2.
When zero or positive Filter Blend values are used, there is only one overdrive circuit
for both filters.
Use of negative Filter Blend values introduces another overdrive circuit, which
distorts the output signal of the oscillator mix stage before it is fed into the first
filter.