Table of Contents
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A U D I O
TM
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
What's in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Quick Start Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Duo Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Minimum System Requirements
Front Panel: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Back Panel: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Bottom of Unit: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Basic Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Hardware & Software Installation on the PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Windows XP Installation
Windows 2000 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Windows ME Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Hardware & Software Installation on the Mac . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Hooking up your USB Audio Duo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Using the Input and Output Level Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Using the Mic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Setting the Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Phantom Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Using the Pad Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Standalone Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Duo Operation on the PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
The USB Audio Configuration Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
The Duo and the Windows Sound System . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
The Duo, MME, and Your Music Program . . . . . . . . . . . . . . . . . . . . . . . . . . .16
ASIO/EASI Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
ASIO/EASI Control Panel and Operating Modes on the PC . . . . . . . . . . . . . .17
Advanced Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Duo Operation on the Macintosh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
The Macintosh Sound Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
ASIO Operation on the Macintosh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
ASIO Control Panel and Operating Modes on the Mac . . . . . . . . . . . . . . . . . .21
Optimizing Your System for USB Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Troubleshooting: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Before You Call Midiman/M-Audio Technical Support . . . . . . . . . . . . . . . . . .25
Limited Lifetime Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
DUO
Users Manuual
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Table of Contents
Related Manuals for M-Audio Duo
Summary of Contents for M-Audio Duo
- Page 1 Hooking up your USB Audio Duo ........
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Page 2: Introduction
Here is a basic outline of the steps you will need to take to get your Duo up and running: 1. Install the drivers, following the instructions for your particular platform and operating system (see “Hardware and Software Installation”... -
Page 3: Duo Features
Other aspects of the Duo, including use of the +4/-10 line level switches, phantom power, etc., are also covered in depth. Also, be sure and check out the section, “Optimizing Your Sytem for USB Audio,“ later in the manual. So, please read on, and enjoy your Duo. -
Page 4: Front Panel
Front Panel: 1. Line Level Input Switch: This switch will set the input line level for the Duo. With the switch in the out position, the Duo will operate at a +4dBu line level. Pressing and locking this switch to the in position will set the operating line level to -10dBV. -
Page 5: Back Panel
5. Line Level Output Switch: This switch sets the operating line level for the Duo Line Outs. In the ‘out’ position, the Duo Outputs 1 & 2 are set to +4dBu line level operation. Pressing and locking this switch to the in position sets these outputs to a -10dBV line level. -
Page 6: Bottom Of Unit
At the bottom of the unit are two DIP switches that will set the sampling rate while the Duo is used in standalone mode. The Duo can be used as an A/D converter independent of the computer, using either the line inputs or the mic preamp inputs. -
Page 7: Hardware & Software Installation On The Pc
Use only the included power supply, or a similar power supply with the exact same specifications. 2. Connect the USB cable to your computer and the Duo (one end of the cable is for the computer, and the other is the device end). Find an appropriate spot on your desktop or work area for the Duo. -
Page 8: Windows Me Installation
Windows will skip this step. This will occur if another USB audio device had been installed on your system at any time. 3. Windows will report that “USB Duo New Hardware” was found. When the Add New Hardware Wizard reports that it wants to search for a driver for a USB Composite Device, click "Next". -
Page 9: Hardware & Software Installation On The Mac
Windows will skip this step. This will occur if a USB audio device had previously been installed in your system. 3. Windows will report that “USB Duo New Hardware” was found. When the Add New Hardware Wizard reports that it wants to search for a driver for a USB Composite Device, click "Next". -
Page 10: Hooking Up Your Usb Audio Duo
The Duo provides two microphone inputs on balanced XLR connectors. Either a mic or a line input can be used on any one of the Duo’s input channels. When a line input is in use, the corresponding mic input is disabled. -
Page 11: Using The Input And Output Level Switches
Mic input on Channel 1, and an electric guitar with direct box plugged into the Mic input on Channel 2. The main outputs (Line Out) of the Duo are plugged into a monitoring system, with the S/PDIF Out connected to the S/PDIF input of a DAT recorder (as you would if you were mixing down). -
Page 12: Using The Mic Inputs
"pre-amp" such as the Duo provides. Other instruments, such as guitar pickups and keyboard sound modules, may also benefit from a little bit of punch from the Duo, when used in conjunction with a direct box or passive impedance transformer. -
Page 13: Phantom Power
Using the Pad Switch On the front panel of the Duo, a “Pad” Switch is provided to attenuate a signal that is too hot before it gets to the mic preamp. If you find that your signal tends to clip even when the gain control knobs are set extremely low, try engaging the Pad Switch. -
Page 14: Duo Operation On The Pc
Mic Inputs or the Line Inputs of the Duo. You will, however, not be able to hear the software outputs from your computer in this case, so this option may only be useful to you when laying down your first recorded tracks, i.e., when there is no other audio playing back from your computer. -
Page 15: The Duo And The Windows Sound System
Emagic’s Logic, then you should leave the configuration manager set to “ASIO/EASI.” The Duo provides its own ASIO and EASI drivers, and the music program you use should be set up to utilize the Duo’s ASIO driver (see the section, “ASIO/EASI Operation”). -
Page 16: The Duo, Mme, And Your Music Program
You will need to monitor that soundcard or audio device separately from the Duo. If your computer does not contain an audio device other than the Duo, you may simply leave the multimedia audio setting to “USB Audio Device.”... -
Page 17: Asio/Easi Control Panel And Operating Modes On The Pc
Once this selection is made, your music program will have USB Duo Input 1 and USB Duo Input 2, as well as USB Duo Output 1+2 available for selection, though this may depend on your configuration in the M-Audio USB ASIO/EASI Driver control panel (see the next section). - Page 18 With both stereo pairs enabled, i.e., Channels 1-2 In and Channels 1-2 Out, the Duo behaves as a “2x2” audio device at 16-bits, and at sample rates of 48000Hz and below (that is, 48kHz, 44.1kHz, 22.05 and 11.025kHz). These sampling rate options as well as the bit depth setting will then be available and selectable from within your music program.
- Page 19 With both stereo pairs enabled at a Bitwidth setting of 24-bits, the Duo will also operate as a 2x2 audio device. In this mode, the Duo is capable of 48kHz or 44.1kHz at either 24- or 16-bits, as set by the music program.
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Page 20: Advanced Tab
At this point in time, most music programs designed for the Mac utilize ASIO drivers. If you decide to switch the Sound Manager to operate the Duo with an ASIO compliant music program, be sure and set it back to “built-in” before... -
Page 21: Asio Operation On The Macintosh
ASIO Operation on the Macintosh The Duo driver installation procedure creates a folder on your desktop called “ Duo ASIO” that contains Duo ASIO drivers. You will find an ASIO driver in this folder. Check your audio program for ASIO compatibility. - Page 22 As a result, the Maximum Sample Rate readout will change to 96000 Hz. The Duo will perform at 96kHz sampling rate with any one of the stereo pairs enabled, and with either the 16- or 24-bit Sample Depth selected. The Duo will operate at 96kHz when the control panel is set to 16-bits, though this is not a likely choice for 96kHz recording (it’s sort of the digital audio equivalent to...
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Page 23: Optimizing Your System For Usb Audio
USB audio, the resulting effect being clicks and pops in your audio performance. The Duo requires a lot of the USB bandwidth, so it’s a good idea not to have any active USB devices attached when using the Duo. If you experience clicks and pops in your audio tracks, consider temporarily disabling network cards or modems. -
Page 24: Troubleshooting
Duo drivers. Then, go to Apple | Control Panel | Sound, and set the output (and the input, if you like) to “USB Audio.” If the Duo is set to “built-in” in the Apple Sound Control Panel, then you will be able to hear the system sounds through the computer’s internal speaker(s). -
Page 25: Before You Call Midiman/M-Audio Technical Support
The Midiman/M-Audio web page is also available to you on your drivers CD ROM. There you will find FAQs, Tips & Tricks, and How-To Guides to walk you through installing your product as well as configuring it with some of today’s most popular software... - Page 26 After gathering this information, please have your telephone near your computer and/or Midiman/M-Audio product. If you’re calling from a cell phone, please prepare plenty of battery power as well as make sure that a cellular signal can be clearly reached where you are calling from.
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Page 27: Limited Lifetime Warranty
In the event any remedy hereunder is determined to have failed of its essential purpose, all limitations of liability and exclusion of damages set forth herein shall remain in full force and effect. DUO-010802... - Page 28 Notes...