X-Treme Audio XTDP - Manual (Page 7)

Owner’s manual
7. DSP processing
7.1 Input Channels
Gain
• Knob A: Gain, adjustable in 0.2 dB steps from –80 dB to +20 dB
Delay
• Knob A: Delay, adjustable in variable steps from 0 to 400 ms.
The delay parameter is adjustable in fine steps at low values; the
adjustment becomes progressively coarser as the value increases.
The velocity sensitive Parameter Knobs therefore provide accurate
setting of driver offset delays (typically below 10 ms) and rapid set-
ting of longer system alignment delays.
High Pass Filter
• Knob A: Frequency, from 20.0 Hz to 25.6 kHz, in variable steps
• Knob B: High pass filter type
System high pass filtering is provided for the input signal. This is the
preferred location for high pass filtering as it affects all outputs and
can therefore improve inter-band phase relationships. Filter type is
selectable from Butterworth, Bessel, Linkwitz-Riley and Hardman.
Filter slopes of up to 4th order or 24dB / octave are provided. Not
all filter types are available in all slopes. For example 18dB / octave
Linkwitz-Riley filters do not exist. The Hardman type filter is always
described by its order as the filter becomes progressively steeper
rather than following a linear slope so a dB/octave description is
not accurate.
Parametric Equalisation
Eight sections of equalisation are provided, two shelving filters and
six fully variable parametric sections.
High and Low shelving filters
• Knob A: Transition Frequency, 10 Hz - 25.6 kHz in variable steps
• Knob B: Slope, 6 to 12dB / octave in 1dB steps
• Knob C: Gain, +/-15dB in 0.2dB steps
The frequency is specified as point where the filter deviates by 3dB
from the gain value.
Parametric filters
• Knob A: Centre Frequency, 10.0 Hz - 25.6 kHz in variable steps
• Knob B: Width, display selectable: Q or Oct (Bandwidth). Oct
adjustable from 0.1 to 5 octaves in variable steps, Q adjustable
from 14.2 to 0.2 in variable steps
• Knob C: Gain, +/-15 dB in 0.2 dB steps.
7.2 Output Channels
Gain and Polarity
• Knob A: Gain, adjustable in 0.2 dB steps from –80 dB to +20 dB
• Knob B: Polarity, selectable, normal or reversed with reference to
other outputs.
Delay
• Knob A: Delay, adjustable in variable steps from 0 to 80 ms
As for input delay, velocity sensitive Parameter Knobs provide finer
adjustment at low levels and rapid selection of higher values.
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