Page 2 - Introduction; Your Duo box contains:; Quick Start Guide
Introduction Congratulations on your purchase of the Duo, designed and manufactured byM-Audio. The Duo is a complete USB audio solution for your PC or Macintoshcomputer. With two inputs and two outputs of 24-bit audio and up to 96kHzsampling frequencies, coupled with two high quality mic preamps, th...
Page 3 - Duo Features; • Preamps have maximum gain of 60dB with signal and clip indicator; Minimum System Requirements; Macintosh
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 thesection, “Optimizing Your Sytem for USB Audio,“ later in the manual. So, pleaseread on, and enjoy your Duo. Duo Features • 2 critically acclaimed D...
Page 5 - V AC Power Jack: This power jack accepts a 9v AC 1 Amp 2.5mm power
Back Panel: 1. 9V AC Power Jack: This power jack accepts a 9v AC 1 Amp 2.5mm power supply. This power supply is included with your Duo, and ONLY the propersupply should be used. 2. USB Connector: This jack accepts the device-end of a standard USB cable. 3. S/PDIF Out: This coaxial RCA digital audio ...
Page 6 - Basic Theory of Operation; The Duo is a 2x2 audio interface, providing two channels of audio
Bottom of Unit: At the bottom of the unit are two DIP switches that will set the sampling ratewhile the Duo is used in standalone mode. The Duo can be used as an A/Dconverter independent of the computer, using either the line inputs or the micpreamp inputs. The relative positions of these DIP switch...
Page 7 - Hardware & Software Installation on the PC; Windows XP Installation; Boot Windows XP with your M-Audio USB Duo powered OFF. After
The Duo can be used with the Sound Manager on the Macintosh, or with theWindows Sound System in Windows, and therefore can operate as your systemsound card. If your software is ASIO or EASI compliant, such as Steinberg’sCubase or Emagic’s Logic, we suggest using the ASIO or EASI drivers. Thesedriver...
Page 9 - Hardware & Software Installation on the Mac; On the Driver Disk that came with your Duo, locate the folder
driver. Note: If the "USB Composite Device" has already been installed thenWindows will skip this step. This will occur if a USB audio device hadpreviously been installed in your system. 3. Windows will report that “USB Duo New Hardware” was found. When the Add New Hardware Wizard reports th...
Page 10 - Hooking up your USB Audio Duo
Double click on the Installer program. The Installer program installs all Duoextensions, and installs the ASIO driver in a folder named “Duo ASIO”onyour desktop. 2. locate the program’s ASIO folder (it will be found within the program’s folder on your Macintosh HD). Drag the ASIO driver (located in ...
Page 11 - Using the Input and Output Level Switches
speakers, or a headphone amplifier, or to the inputs of a mixing console. Again,check your device’s documentation for information on its operating line level,and see the section, “Using the Input and Output Level Switches.” The Duo’sS/PDIF Out can be connected to any S/PDIF capable device, such as a...
Page 13 - Operating the Duo in Standalone mode will give you three options:; The Duo can be used as an analog to digital, or “A/D” converter. A signal
Phantom Power Unlike dynamic microphones, many "condenser microphones" need to receive aDC voltage (generally 48v) from an external source before they can generate anoutput signal. If the condenser mic doesn’t come with its own power supply, thenphantom power must be applied from the pre-amp...
Page 14 - Duo Operation on the PC; The USB Audio Configuration Manager
at either the Mic Inputs or the Line Inputs of the Duo. You will, however, not beable to hear the software outputs from your computer in this case, so this optionmay 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; logo on the right side of your Windows taskbar.
The USB Audio Configuration Manager, when it is first installed, defaults to the“ASIO/EASI” setting. If you are using an ASIO compliant program such asSteinberg’s Cubase or Nuendo, or a program that uses “EASI” drivers such asEmagic’s Logic, then you should leave the configuration manager set to“ASI...
Page 17 - ASIO/EASI Control Panel and Operating Modes on the PC
automatically during the normal installation procedure. The USB AudioConfiguration Manager defaults to ASIO/EASI operation, so there’s no need tochange any settings there. NOTE: You may have the Windows sound system set to “USB AudioDevice” while the USB Audio Configuration Manager is set to“ASIO/EA...
Page 20 - Advanced Tab; Duo Operation on the Macintosh; The Macintosh Sound Manager
In the M-Audio USB ASIO Driver control panel, to the right of the Bitwidthsection, you will see a “Latency” drop-down list that will set the Duo’s buffersize. A lower latency setting represents a smaller buffer size, with the lowersetting being desirable when using the ASIO drivers. How low you can ...
Page 23 - Optimizing Your System for USB Audio; Here are some other things to consider:
In the Duo Settings control panel, below the Maximum Sample Rate readout, youwill see a drop-down list that will set the “Latency” that you will experience whilemonitoring input through your music program (this is achieved by varying theDuo’s audio buffer size). You should be able to find more infor...
Page 25 - Read Me Files; Gather Important Information; System Information; : The next most important piece of information is what
Problem: I hear a ticking sound along with my audio. Possible Cause1: Use the Duo plugged directly into the computer’s USB port. On the other USB port, use only the computer keyboard and mouse with noother USB devices. Possible Cause2: This could be due to an internal device interfering with the USB...
Page 26 - Appendix A - Technical Specifications; Analog Audio; Digital Audio
Soundcards, Ethernet adapters embedded on the motherboard, or connected via USB,ISA, or PCI. How many PCI/ISA slots do you have and are you using any USB hubs? 3.Are you recording to IDE or SCSI hard drives? These are extremely important pieces of information to know when calling us.Finally, Mac use...
Page 27 - Limited Lifetime Warranty
Limited Lifetime Warranty MIDIMAN warrants that this product is free of defects in materials andworkmanship under normal use so long as the product is: owned by the originalpurchaser; the original purchaser has proof of purchase from an authorizedMIDIMAN dealer; and the purchaser has registered his/...