Accuphase DG 38 Brochure

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Accuphase DG 38 Brochure

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Sound field compensation (voicing) Spectrum analyzerSound field creation (Equalizer) Configuration CONFIGURATION Two main circuit as- semblies with four high speed 40bit floating point DSP chips, Ultra Jitter-Free PLL circuit, tone generator, HS- Link en-coder/decoder, digital input/output connectors etc. The DG-38 has four main operation modes: "Voicing", "Equalizer", "Analyzer", and "Configuration". 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 curves. 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.