User manual M-AUDIO MOBILEPRE (2ND GEN)

[. . . ] MobilePre User Guide Legal Notices This guide is copyrighted ©2010 by Avid Technology, Inc. , with all rights reserved. Under copyright laws, this guide may not be duplicated in whole or in part without the written consent of Avid Technology, Inc. Avid, Pro Tools, Pro Tools M-Powered, and M-Audio are either trademarks or registered trademarks of Avid Technology, Inc. All other trademarks contained herein are the property of their respective owners. [. . . ] You should decide on a sample rate and bit depth for your project before recording, to maximize fidelity and avoid time consuming format conversions. These settings can be changed in the MobilePre Software Control Panel, as described in Chapter 4, "MobilePre Software Control Panel. " The following guidelines should help you choose appropriate settings for your recording: Direct Monitoring When recording an audio signal into your music software, there is often a slight delay before it reaches the outputs of the software and MobilePre. This delay, called latency, is caused by the computer processing required to convert and record audio. Since this delay can be distracting, MobilePre provides a direct monitoring path from the inputs to the outputs, which is activated by pressing the Direct Monitor button. When the Direct Monitor button is pressed, the input signal is mixed with the output signal from your music software, and routed directly to the Line and Headphone Outputs. This allows you to hear the "live" inputs without latency. The Direct Monitor button has no effect on what is being recorded by your software. When using the Direct Monitor feature, make sure any software monitoring option for direct (or "low latency") monitoring is disabled. This prevents the software from sending the recorded signal (post-disk) to the Line and Headphone outputs, which would cause "double-monitoring. " Music Projects If the final mix will be played back on CD, or in MP3 format, a resolution of 24 bits with a sample rate of 44. 1 kHz is recommended. The final output file will have to be converted to 16-bit/44. 1 kHz for playback on CD and some audio player applications. Video Projects If the final mix is intended for DVD, film or TV, a resolution of 24 bits with a sample rate of 48 kHz is recommended. It is not possible to raise the fidelity of previously recorded audio by increasing its bit depth or sample rate. Always use the highest possible settings that are appropriate for your project. 12 MobilePre User Guide chapter 6 Troubleshooting MobilePre has been designed and tested under a wide range of systems and operating conditions to give you high performance and professionalquality audio. However, there is a large number of operating scenarios that could affect your system's performance. Although this chapter cannot cover all issues you may encounter, it does offer some suggestions for dealing with common problems. We recommend that you avoid connecting too many devices via USB. The USB bus is a dependable protocol that is ideally suited for digital audio. Nevertheless, it is important to remember that audio and multimedia streaming can place considerable demands on your processor and the USB bus. Check Your Connections If you are having trouble getting audio in or out of your MobilePre, check the following: Make sure the device is connected via USB at both ends, and that the computer's USB port is providing sufficient bus power (the blue Power LED on MobilePre should be illuminated). Make sure your music software is receiving audio signal. If you find that your recording application is not receiving a signal: · Check your connections and cables to make sure everything is plugged in correctly. · Try using a different USB cable and USB port on the host computer. · Check the Signal/Clip indicators for each channel to see if an input signal is present. · If your condenser microphone requires phantom power, make sure the Phantom Power switch is set to the "on" position, and that the front panel Phantom Power LED (48V) is illuminated. For more troubleshooting tips, visit the Knowledge Base at www. m-audio. com/faq. Chapter 6: Troubleshooting 13 Check the MobilePre Drivers Before Updating Your System Visit www. avid/support for a compatible driver before installing Microsoft or Apple operating system updates. [. . . ] · Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. · Consult the dealer or an experienced radio/TV technician for help. Any modifications to the unit, unless expressly approved by Avid, could void the user's authority to operate the equipment. Safety Compliance Warning 18 MobilePre User Guide Important Safety Instructions 1) Read these instructions. 5) Do not use this equipment near water. [. . . ]