Apple Soundtrack Pro - Manual (Page 199)

Chapter 9 Working With Audio Effects 199
Frequency Ranges Used With EQ
All musical sounds can be categorized into one of three basic frequency ranges: bass,
midrange, or high (also called treble). These can be further divided to include low bass,
low and high midrange, and low and high highs. The following table describes some of
the sounds affected by each range:
Name Frequency range Description
High High 8–20 kHz Includes cymbal sounds and
highest harmonics of
instruments. Boosting
frequencies in this range slightly
can add sparkle and presence.
High 5–8 kHz This range corresponds roughly
to the treble tone control on a
stereo. Boosting frequencies in
this range can add brightness
and shine.
Low High 2.5–5 kHz Includes the higher harmonics of
voices and musical instruments.
This range is important for
adding presence. Excessive
boosting in this range can sound
shrill or harsh.
High Midrange 1.2–2.5 kHz Includes the consonants of
voices and the high harmonics
of musical instruments,
especially brass instruments.
Excessive boosting in this
range can create a pinched,
nasal sound.
Midrange 750 Hz–1.2 kHz Includes the vowels of voices
and the harmonics of musical
instruments that create tone
color.
Low Midrange 250–750 Hz Includes the fundamentals and
lower harmonics of voices and
musical instruments; careful
EQing of each can keep them
from competing. Excessive
boosting in this range can result
in muddy and unclear audio;
excessive cutting can produce
thin-sounding audio.