Apple Soundtrack Pro 2 - Manual (Page 341)

Chapter 11 Working with Audio Effects 341
Clicking the Goniometer button turns on the Goniometer and turns off the Spectrum
Analyzer. You can use the Auto Gain display parameter in order to obtain a higher readout
on low-level passages. Auto Gain allows the display to automatically compensate for low
input levels. You can set the amount of compensation with the Auto Gain parameter, or
set Auto Gain by dragging directly in the display area of the Goniometer.
Note: Auto Gain is a display parameter only and increases the display for better
readability. The actual audio levels are not touched by this parameter.
Miscellaneous Effects
Miscellaneous effects don’t fall into any of the other categories. They include denoising
effects, pitch shifting effects, stereo enhancers, bass enhancers, and effects used to
transform the sound of vocals. Each effect gives you a different way to modify the
audio, and includes a unique set of parameters.
Denoiser
Using the Denoiser, you can eliminate or reduce many kinds of low-level noise (noise
floor) from an audio signal. The main parameters of the Denoiser are Threshold, Reduce,
and Noise Type. The Threshold parameter sets how high the noise floor is for the audio
signal. The recommended method for setting the Threshold is to find a passage where
you hear only noise, then set the Threshold so that signals at this volume level are
filtered out.
The Reduce parameter sets the level to which the noise floor is reduced. You use the
Noise Type parameter to set the type of noise that the Denoiser reduces. There are
three choices of noise type:
 Setting the Noise Type to 0 (zero) causes the Denoiser to reduce “white noise” (all
frequencies reduced equally).
 Setting the Noise Type to a positive value causes the Denoiser to reduce “pink noise”
(harmonic noise; greater bass response).
 Setting the Noise Type to a negative value causes the Denoiser to reduce “blue noise”
(hiss, sibilants, tape noise).
The Denoiser recognizes frequency bands with a lower volume and less complex
harmonic structure, and then reduces them to the desired dB value. This method is not
completely precise, and neighboring frequencies are also reduced. Using the Denoiser
at too-high settings can produce the “glass-noise” effect, which is usually less desirable
than the existing noise.