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Table Of Contents
In between these positions, the filters are cross-faded.
You can also cross-fade the filters when they are cabled in series. In this scenario, the
distortion—controlled by the Drive parameter—also needs to be considered, as this can
be positioned either before or in-between the filters, depending on the Filter Blend setting
you choose.
Using the ES2 Router to Control Filter Blend
The Filter Blend parameter is available as a modulation target in the router. You can
obviously use manual control sources, such as the modulation wheel, to change the
filter blend; but the Filter Blend can also be used creatively, to rapidly switch or smoothly
fade between the two filters.
Examples of sources you might consider include an LFO, velocity, or even a combination
of the Vector Envelope and Planar Pad—using the X or Y Pad parameters as sources.
The latter would enable some interesting filter control possibilities that would evolve
along with oscillator parameters (also being controlled via the Vector Envelope), or
independently.
The Impact of Filter Blend 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 will limit
audibility to Filter 2.
The figures illustrate the signal flow between the Oscillator Mix stage (the Triangle) and
the dynamic stage. 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.
66 Chapter 5 ES2