29
How to Operate the MA8900, con’t
Equalizer Controls
The MA8900 Equalizer has five Frequency Controls
which will raise or lower by 12dB, the amplitude of
the band of frequencies centered at the frequency
marked above the controls. The center frequencies of
these controls are at 30Hz, 125Hz, 500Hz, 2,000Hz
and 10,000Hz. Both Left and Right Channels are
affected. At the center detent or flat position of the
controls, the tone circuit components are removed
from the signal path.
The illustration to the right shows the fundamental
frequency range of acoustical musical instruments and
the human voice. It also shows the range of adjustment
of frequencies for each of the Equalizer Controls of
the MA8900 at the +6dB and -6dB points.
Optical and Coaxial Digital Inputs
When a Digital Input (Optical or Coaxial Connection)
on the MA8900 is selected, the Front Panel Display
will indicate the sample rate when a signal is present
“48kHz”. Refer to figure 76.
During the time there is no Digital Signal present on
the selected input the display will indicate “______”.
Refer to figure 77.
SOPRANO
CONTRALTO
TENOR
BARITONE
BASS
PICCOLO
FLUTE
OBOE
ENGLISH HORN
B CLARINET
BASS CLARINET
ALTO SAXOPHONE IN B
BASSOON
CONTRABASSOON
B TRUMPET
FRENCH HORN IN F
TENOR TROMBONE
BASS TROMBONE IN F
TUBA
MEDIUM
SMALL
LARGE
HARP
GUITAR
VIOLIN
VIOLA
CELLO
BASS
PIANO
STRINGS
KETTLE DRUMS
BRASS
WOODWINDS
SINGING VOICE
10kHz
125Hz
500Hz
2kHz
30Hz
Fundamental Frequencies of Acoustical Musical Instruments and the Human Voice
Figure 76
COAX 1 30%
48kHz
Figure 77
COAX 1 30%
______
Summary of Contents for MA8900
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