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MD-4
The MD-4 algorithm occupies:
@ Normal Sample Rate : 1/4 DSP Resource
@ Double Sample Rate : 1/2 DSP Resource
Algorithm Inputs/Outputs are distributed as follows:
I/O 1-2: Stereo or Dual mono processing
I/O 3-4: Thru channels, no delay
Main Page
E1 - E4
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2
3
4
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2
3
4
INPUT
OUTPUT
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Input
In Gain L - In Gain R
Range: 0dB to Off
Input Gain on Left and Right channels.
Delay
Range: 0 to 2000ms
Delay setting for L and R channels
Delay Unit
Range: Milliseconds (ms), Frames 24, Frames 25, or
Frames 30.
Phase Inv. L - Phase Inv. R
Phase Inverse switch for individual channels.
Filter
Lo Cut
Range: Off to 200Hz
1st order low cut filter mainly for DC removal. If digital
Inputs close to full scale are used, turn off the filter or
adjust down the In Gain in order to avoid overloads.
Normalize
Range: -18 dB to +18 dB
Overall Gain/Drive control. Once the Thresholds of the
Multiband section and Limiters have been adjusted
relatively to each other, the Trim is a convenient place to
adjust more or less dynamics processing and Loudness.
Trim offers the same “Drive” approach to level and
Threshold used in classic analog Limiters. Unlike analog
designs, MD4’s 48 bit internal resolution prevents
resolution and signal/noise ratio from being sacrificed,
because the processing dynamic range is larger than even
the highest resolution Input would be.
Setup Page
Introduction
Multiband processor featuring newly developed DXP
processing that lifts up low level detail rather than
squashing the peaks. DXP processing is ideal for classical
music, acoustic music, voice, film to broadcast transfers
– and other situations where low level subtleties tend to
get lost. The algorithm also features normal and parallel
compression, and the basic mode can be combined with
EQ, MS processing and upsampled, adaptive limiting.
The five band structure uses phase linear reconstruction,
and a 48 bit fixed point resolution signalpath.
MD4’s hi-rate calculations provides the extra benefit of low
latency dynamics processing with low transient distortion.
For realtime sensitive applications the throughput delay
is 38 samples at 44.1 kHz (0.86 ms, or equivalent to
a source-to-mic distance of 0.3 m = 1 foot). See the
description of Look Ahead Delay for more information.
