Sound field compensation (voicing)
Spectrum analyzerSound field creation (Equalizer)
Two main circuit as-
semblies with four high
speed 40bit floating
point DSP chips, Ultra
Jitter-Free PLL circuit,
tone generator, HS-
The DG-38 has four main
Four buttons on the front
panel are used to select
the respective mode.
Because the DG-38 incorporates both measurement and adjustment functions,
accurate sound field compensation can be carried out easily. 68 IIR type
filters with 1/6 octave spacing are used for measuring the sound field, and
the resulting data provide the basis for accurate compensation.
This screen gives access to various functions including microphone setup,
target curve setup, auto compensation, display of frequency response
before and after compensation, and calling up or saving frequency response
The spectral content of the input signal can be displayed on a spectrum
analyzer screen with 1/3 octave spacing, 35 bands, and real-time operation.
This function is entirely separate from the adjustment functions of the unit,
allowing you to monitor peak levels in real time. Comparison of Voicing and
Equalizer on/off condition and checking of right/left frequency distribution
are also possible.When power to the DG-38 is turned on, the Equalizer screen shown here appears.
In this mode, the user can create a desired sound field by drawing a frequency
response curve. This can be done with the supplied stylus pen directly on the
display screen. A cursor keypad is also available, for manually creating the curve
or making adjustments. The values set using this screen are automatically read
and applied by the digital filters.
The equalizer filter section uses 74 IIR + FIR hybrid type filters with 1/6 octave
spacing. Because the digital filters for sound field compensation and sound field
creation are separate, equalization can be further modified after the sound field
compensation (voicing) curve has been established.
This screen lets you make environment and function settings, such as
selecting the Voicing/Equalizer modes, controlling levels, left/right balance,
screen brightness and contrast, screen data send etc.
Functions are activated directly on the screen with the stylus pen.