User Manual
Table Of Contents
- Title Page
- Quick Start Guide
- LP32 Front Panel
- LP32 Rear Panel
- MOTU Pro Audio 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)
- 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 the LP32
- Comprehensive I/O
- Flexible optical I/O
- Network I/O
- Other MOTU AVB interfaces
- Universal computer connectivity
- On-board DSP with mixing and effects
- 32-bit floating point processing
- Modeled vintage effects processing
- AVB/TSN system expansion and audio networking
- Matrix routing and multing
- Web app control
- Stand-alone mixing with wireless control
- Comprehensive metering
- Headphone output
- Rack mount or desktop operation
- Audio analysis tools
- AudioDesk
- 2 Packing List and System Requirements
- 3 Software Installation
- 4 Hardware Installation
- Overview
- USB or iOS audio interface setup
- AVB Ethernet audio interface setup
- Setup for two interfaces
- Setup for three to five interfaces
- Setup for a multi-switch network
- Setup for multiple interfaces
- Setup for web app control
- Setup for AVB Ethernet audio interface operation
- Audio connections
- Synchronization
- Syncing optical devices
- Syncing word clock devices
- Syncing an AVB network
- Syncing multiple AVB audio interfaces connected to a Mac
- 5 Presets
- 6 The Front Panel LCD
- 7 Working with Host Audio Software
- Overview
- Preparation
- Run the web app
- Choose the MOTU Pro Audio driver
- Reducing monitoring latency
- Monitoring through the LP32
- Direct hardware playthrough / Direct ASIO monitoring
- Monitoring through your host audio software
- Adjusting your host software audio buffer
- Adjusting buffer size on Mac OS X
- Adjusting buffer size on Windows
- Lower latency versus higher CPU overhead
- Transport responsiveness
- Effects processing and automated mixing
- Working with the Routing grid
- 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 sources to one output
- Routing grid tutorials
- Working with on-board mixing and effects
- 8 Mixer Effects
- 9 MOTU Audio Tools
- 10 Networking
- A Troubleshooting
- B Audio Specifications
- C Mixer Schematics
- D Updating Firmware
- E OSC Support
- Index
MOTU AUDIO TOOLS
85
outside the critical frequency range of the
instrument being recorded, you can avoid phase
problems among the mic signals.
Tun i ng PA systems
The Phase Analysis window can also be used to
troubleshoot and tune PAs and sound
reinforcement systems by placing microphones in
strategic locations, comparing the two signals in
the Phase Analysis grid and looking for phase
issues at various locations.
Summing to mono
The Phase Analysis window is ideal for checking
stereo audio that needs to be summed to mono.
The Phase Analysis lets you see what frequencies
will be canceled out when summed.
In the rectangular view, any lines in the signal that
touch the +1.0 or -1.0 vertical lines in the grid will
be canceled out at the frequency where they touch,
when the signal is summed to mono.
In the polar view, any signal that falls on the
negative y axis (below zero) will be canceled out
when the signal is summed to mono.
Checking for phase issues in stereo tracks
You can use the Phase Analysis window to check
the overall polarity of a stereo mix. Figure 9-27 is
an example of a full stereo mix that has phase
issues, as indicated by the majority of the signal’s
energy, which is predominantly skewed to the left
side of the rectangular view (left) and spread along
the -y axis in the polar view (right).
Figure 9-27: A stereo mix with phase issues.
Figure 9-26: Two identical audio streams in the Phase Analysis.
Perfectly in phase One-sample delay Twenty-sample delay
Polar view
Rectangular
view
Inverted