Apple Soundtrack Pro 2 - Manual (Page 216)

216 Chapter 6 Editing Audio Files
Using the Spectrum View HUD
The Spectrum View HUD is a floating window that provides extensive controls for
Frequency Spectrum view.
 Preemphasis: Applies gain per octave. Drag the slider to the right to emphasize high
frequency content.
 Minimum Frequency: Allows you to view a subset of the frequency range (for
example, only the frequencies over 1 kHz).
 Maximum Frequency: Allows you to view a subset of the frequency range (for
example, only the frequencies under 9 kHz).
 Minimum Power: Defines the bottom of the scale (where the blue portion of the
gradient starts).
 Maximum Power: Defines the top of the scale (where the red portion of the
gradient ends).
 Analysis Window: To display the audio file in Frequency Spectrum view, part of the
audio data for each given point in time is analyzed. Each method of analysis
represents a slightly different compromise between frequency resolution and spectral
leakage. You can choose between several different analysis methods, called analysis
windows, used to display the frequency spectrum in Frequency Spectrum view.
 Window Size: The number of samples used for Frequency Spectrum view. This
parameter trades off frequency resolution for time resolution. Smaller window sizes
are more accurate timewise, but smear frequency information across adjacent
frequencies (vertical lines, or transients, appear sharper). Larger window sizes provide
a more accurate frequency display, but will smear things horizontally (horizontal lines
appear sharper, but transients are smeared).
 Frequency Scale: Use Frequency Scale to switch between linear display (in which
harmonics appear evenly spaced) and logarithmic display (in which octaves appear
evenly spaced).