HP Vectra XA 6/xxx HP Vectra XA 6/xxx PC - User’s Guide, D4544-90001 - Page 60

naja-3.fb4 Page 50 Wednesday, May 15, 1996 1:59 PM 3 Troubleshooting Your PC Changing the Battery Audio Input from the Check that the microphone specifications meet the requirements of the Microphone is Too Low, 16-bit sound components. The microphone should be a 600-ohm or No Audio At All dynamic type. Humming Noise If the power grounding of your audio components is inadequate, a humming noise may be generated. This may happen if your PC is connected to a hifi system. 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. Data compression can reduce the space required. The A-law and µ-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. MS-DOS Games Give "Not enough memory" Errors Many games require a large amount of base memory and may not execute if many drivers or TSR (Terminate and Stay Resident) programs are installed. You may solve this problem by loading device drivers and TSRs into high memory. Refer to your MS-DOS manual for details of how to do this. Changing the Battery You should order replacement battery HP 1420-0356 from your local Sales and Service office, or the equivalent "CR2032", which is available from most local stores. 50 English