MOTU 828es, Руководство пользователя

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CHAPTER
71
9
Mixer Effects
OVERVIEW
This chapter provides further information about
the effects processors available in the DSP mixer
in the 828es. For basic mixer operation, see:
Mixing tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Aux Mixing tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Mixer input channel strips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Main Mix and Monitor channel strips . . . . . . . . . . . . . . . . . . . 19
Aux bus channel strips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Group and Reverb channel strips . . . . . . . . . . . . . . . . . . . . . . . 21
Powerful DSP-driven mixing and effects
The mixer is driven by a powerful DSP that
delivers 32-bit floating point precision and plenty
of processing bandwidth for no-latency effects,
including parametric EQ, dynamics, and reverb.
Effects can be applied when operating as an audio
interface or as a stand-alone mixer without a
computer. Input signals to the computer can be
recorded wet and/or dry, or recorded dry while a
real-time wet monitor mix is sent to musicians.
Effects include:
High Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A conventional high pass filter
Gate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
A standard gate with threshold/attack/release
controls
Four-band parametric EQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Multi-band parametric EQ modeled after British
analog consoles
Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
A standard compressor with threshold/ratio/
attack/release/gain controls
Leveler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
The Leveler™, an accurate model of the legendary
LA-2A optical compressor, which provides
vintage, musical automatic gain control
Reverb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Classic reverb with tail lengths up to 60 seconds
Advantages over host-based mixing and
processing
The hardware mixer in the 828es provides several
major advantages over mixing and processing in
your host audio software:
■
No buffer latency. The DSP-mixer provides the
same near-zero latency throughput performance
as a conventional digital mixer. Effects processing
doesn’t impact your computer’s CPU.
■
DSP mixing and routing can be maintained
independently of individual software applications
or projects.
■
DSP-driven mixing can function without the
computer, allowing the 828es to operate as a
portable, stand-alone mixer with effects.
☛
Effects are disabled when operating at 4x
sample rates (176.4 or 192 kHz).
HIGH PASS FILTER
All input channel strips provide a 12 dB per octave
high pass filter. High Pass filters are often used to
remove unwanted mic rumble, for example.
Figure 9-1: The High Pass Filter.