If Your Pc Has An Audio (Sound) Problem - HP Net PC 20 Troubleshooting Manual

Hp net pc 20: supplementary guide

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User manual (232 pages)

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Table Of Contents

Table of Contents

Problem

WARNING: If your PC is a multimedia PC or if you add a sound card to your PC, always turn the volume down before

connecting headphones or speakers, to avoid discomfort from unexpected noise or static. Listening to loud sounds for

prolonged periods of time may permanently damage your hearing. Before putting on headphones, place them around your

neck and turn the volume down. When you put on the headphones, slowly increase the volume until you find a comfortable

listening level. When you can hear comfortably and clearly, without distortion, leave the volume control in that position.

No sound when

If you are using Windows NT 4.0, check the volume, mute, and balance settings. Refer to the operating

running any

system documentation for more information.

applications.

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 21).

No output from the

This might be due to the DMA channel selected or to an interrupt conflict. Use your operating system's

8-bit or 16-bit

audio control software to change the audio interface's DMA channel or IRQ setting (refer to page 21).

digitized sounds.

Audio input from the

Check that the microphone specifications meet the requirements of the 16-bit sound components. The

microphone is too

microphone should be a 600-ohm electret type.

low, or no audio at

all.

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

These crackles are usually the result of your PC being unable to transfer audio samples within the required

when playing back

time. A solution is to use a lower sampling rate. Recording and playing back at 22 kHz is less demanding

sounds.

upon system resources than recording audio at 44 kHz.

The PC hangs while

Uncompressed digital audio can eventually fill your hard disk. For example, one minute of stereo sound

recording.

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 -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.