10.6

Table Of Contents
88Logic Pro Instruments
Control parallel source filters with morphing
The previous task set up a number of vowel sounds with source filters. Follow these steps
to morph between these sounds with your keyboard modulation wheel.
1. In Logic Pro, click Morph to view morph parameters, then click the Morph Lin button.
2. Set the X knob to 0%.
In the modulation rack, Morph All X is shown at the top.
3. Choose Perform > Control7 in the first modulation rack slot. Leave the modulation depth
value at 100%.
The modulation wheel is linked by default to performance control 7.
4. Play your keyboard, and move your modulation wheel to morph between the source
filtered sounds.
If the output level seems low, you can boost it by increasing the value of the Vol knob in
the Master section or the Volume knob on the Name bar.
Logic Pro Alchemy filter types
Alchemy provides a total of 15 multi-mode filter modules. These can be used at the source
level or as main filters that process all routed signals. Filters used at the source or main
filter stages affect each voice independently. You can also insert filters in the effects
section, but they are monophonic when used at this point in the signal path and affect all
voices (the overall signal) simultaneously.
Two main filters. See Logic Pro Alchemy main filter controls.
Four sets of three source filters. See Logic Pro Alchemy source filters.
The MMFilter module in the effects section. See Logic Pro Alchemy filter effects.
There are dozens of filter types to choose from in the main filters and the MMFilter effects
module.
Alchemy filter types: lowpass, bandpass, highpass
A lowpass (LP) filter passes the portion of a signal below a specified cutoff frequency and
rolls off the portion above that frequency. A bandpass (BP) filter passes the portion of a
signal occupying a band surrounding the cutoff frequency and rolls off the portions above
and below that band. A highpass (HP) filter passes the portion of a signal above a specified
cutoff frequency and rolls off the portion below that frequency.
There are multiple LP, BP, and HP filter designs in Alchemy, each with distinctive
characteristics that you may prefer for a given purpose. The available LP, BP, and HP filter
designs include:
Clean: Bi-Quad filters. These filters have no Drive option.
Edgy: Two- or four-pole analog-modeled filters. Four-pole variants provide a steeper
roll-off of frequencies beyond the cutoff.
Gritty: Two-pole filters designed to saturate heavily at higher Resonance and Drive
settings.
Rich: Two- or four-pole analog-modeled filters. Four-pole variants provide a steeper
roll-off of frequencies beyond the cutoff.