HP Vectra VEi8 HP Vectra VEi7, Troubleshooting and Upgrade Guide - Page 28

1 Troubleshooting Your PC If Your PC Has an Audio (Sound) Problem If Your PC Has an Audio (Sound) Problem Problem Solution No sound when running any If you are using Windows NT 4.0, check the volume, mute, and balance settings. Refer to the operating system applications. documentation for more information. Absence of sound can also be caused by a hardware conflict. Hardware conflicts occur when two or more peripheral devices compete for the same signal lines or channels. Conflicts between your audio interface and another peripheral device might be due to the settings of the I/O addresses, IRQ channel, or DMA channel. To resolve the conflict, change the settings either of the audio interface or of any other ISA accessory in your system (refer to page 27). No sound when playing a multimedia/audio CD Check that the volume control on the CD-ROM drive is correctly set or that the audio cable for the CD-ROM drive is correctly connected to the connector on the system board. If you are using headphones or speakers, ensure they are correctly connected. For information on connecting audio accessories, refer to your PC's User's Guide. No output from the 8-bit or This might be due to the DMA channel selected or to an interrupt conflict. Use your operating system's audio 16-bit digitized sounds. control software to change the audio interface's DMA channel or IRQ setting (refer to page 27). Audio input from the microphone is too low, or no audio at all. Check that the microphone specifications meet the requirements of the 16-bit sound components. The microphone should be a 600-ohm electret type. Humming noise. If the power grounding of your audio components is inadequate, a humming noise may be generated. Plug all devices into adjacent power outlets (outlets within 5 cm / 2 inches of each other), or use line filters. Occasional crackles when playing back sounds. These crackles are usually the result of your PC being unable to transfer audio samples within the required time. A solution is to use a lower sampling rate. Recording and playing back at 22 kHz is less demanding upon system resources than recording audio at 44 kHz. The PC hangs while recording. Uncompressed digital audio can eventually fill your hard disk. For example, one minute of stereo sound recorded at a resolution of 44 kHz will occupy about 10.5 MB. Before recording, check that there is enough free space on your hard disk. A new add-on sound card does not work. Data compression can reduce the space required. The A-law and m-law hardware compression used by the audio interface enables the sampling of sound at a resolution of 16-bits, but it generates the same quantity of data as an 8-bit sample. If you install an add-on sound card, you will need to disable the integrated sound features on your PC. To disable integrated sound (on Windows 95, Windows 98 and Windows NT 4.0), select Control Panel from the Start menu, then click on Multimedia
Advanced. Click on the Audio Device icon, then select the Do not use audio features on this device radio button. 28