User Manual
Table Of Contents
- Title Page
- Quick Start Guide
- 1248 Front Panel
- 1248 Rear Panel
- 8M Front Panel
- 8M Rear Panel
- 16A Rear Panel
- 16A Front Panel
- MOTU AVB Switch
- MOTU AVB Control Web App
- Overview
- It’s not on your hard drive
- Use your favorite web browser
- Control from multiple devices
- Run the installer, get the app
- Make hardware and network connections
- Launching the web app
- Device tab
- Device tab (continued)
- Routing tab
- Mixing tab
- Aux Mixing tab
- Mixer input channel strips
- Main Mix and Monitor channel strips
- Aux bus channel strips
- Group and Reverb channel strips
- 1 About Your MOTU AVB Audio Interface
- State-of-the-art A/D and D/A conversion
- Complementary I/O configurations
- 1248
- 8M
- 16A
- Network I/O
- Universal connectivity
- On-board DSP with mixing and effects
- 32-bit floating point processing
- Modeled vintage effects processing
- AVB system expansion and audio networking
- Matrix routing and multing
- 256 channels of network audio I/O for your host computer
- Web app control
- Stand-alone mixing with wireless control
- ADAT digital I/O
- S/PDIF digital I/O with SRC
- Word clock
- Comprehensive metering
- Headphone outputs
- Precision Digital Trim™
- Rack mount or desktop operation
- AudioDesk
- 2 Packing List and System Requirements
- 3 Software Installation
- 4 Hardware Installation
- Overview
- Rack installation and heat
- Thunderbolt audio interface setup
- USB audio interface setup
- Setup for two interfaces
- Setup for three to five interfaces
- Setup for a multi-switch network
- Setup for multiple Thunderbolt and USB interfaces
- Setup for web app control
- Audio connections
- A typical 1248 setup
- A typical 8M setup
- A typical 16A setup
- Synchronization
- Syncing S/PDIF devices
- Syncing word clock devices
- Syncing an AVB network
- 5 Presets
- 6 The Front Panel LCD
- 7 Working with Host Audio Software
- Overview
- Preparation
- Run the web app
- Sample rate
- Clock Mode
- Enabling and disabling input/output banks
- Specifying the number of computer channels
- Making inputs and outputs available to your host software
- Configuration presets
- Naming computer input and output channels
- Streaming computer audio to and from the onboard mixer
- Working with AVB network streams
- Mirroring computer channels to multiple outputs
- Combining multiple inputs to one output
- Routing grid tutorials
- Choosing the MOTU Audio driver
- Reducing monitoring latency
- Working with on-board mixing and effects
- Synchronization
- 8 Mixer Effects
- 9 Networking
- A Troubleshooting
- B Audio Specifications
- C Mixer Schematics
- D Updating Firmware
- E OSC Support
- Index
CHAPTER
69
8 Mixer Effects
OVERVIEW
This chapter provides further information about
the effects processors available in the DSP mixer in
your MOTU AVB interface. For basic mixer
operation, see:
Mixing tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Aux Mixing tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mixer input channel strips . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Main Mix and Monitor channel strips . . . . . . . . . . . . . . . . 24
Aux bus channel strips. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Group and Reverb channel strips . . . . . . . . . . . . . . . . . . . . 26
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
A conventional high pass filter
Gate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A standard gate with threshold/attack/release
controls
Four-band parametric EQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Multi-band parametric EQ modeled after British
analog consoles
Compressor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
A standard compressor with threshold/ratio/
attack/release/gain controls
Leveler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
The Leveler™, an accurate model of the legendary
LA-2A optical compressor, which provides
vintage, musical automatic gain control
Reverb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Classic reverb with tail lengths up to 60 seconds
Advantages over host-based mixing and
processing
The hardware mixer in your MOTU AVB interface
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 your MOTU AVB device 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