10.6

304Logic Pro Effects
Logic Pro SubBass use tips
Unlike a pitch shifter, SubBass generates a waveform that is not based on the waveform
of the input signal; instead it uses a sine wave. Given that pure sine waves rarely work well
in complex arrangements, make sure to use the Wet and Dry sliders to control the amount
of—and balance between—the generated and original signals.
Use the High parameters and the Low parameters to define the two frequency bands
that SubBass uses to generate tones. High Center and Low Center define the center
frequency of each band, and High Bandwidth and Low Bandwidth define the width of
each frequency band.
The High Ratio and Low Ratio knobs define the transposition amount for the generated
signal in each band. This is expressed as a ratio of the original signal. For example, a
Ratio value of 2 transposes the signal down one octave.
Important: Within each frequency band, the filtered signal should have a reasonably
stable pitch in order to be analyzed correctly.
In general, narrow bandwidths produce the best results, because they minimize frequency
intermodulations which can lead to unpleasant artifacts. Set the High Center knob value a
fifth higher than Low Center, a factor of 1.5 for the center frequency.
Derive the sub-bass to be synthesized from the existing bass portion of the signal, and
transpose by one octave in both bands, using a Ratio of 2. Do not overdrive the process
or you will introduce distortion. If you hear frequency gaps, move one or both Center
frequency knobs, or widen the Bandwidth of one or both frequency ranges a little.
Tip: Be prudent when using SubBass, and compare the extreme low frequency content
of your mixes with other productions. It is very easy to over-enhance the low end of some
tracks, resulting in an unbalanced mix.