Section 7.5. Troubleshooting Sound


7.5. Troubleshooting Sound

The most common sound problem is hearing nothing . One speaker works, for instance, but the other stays mum. When faced with some missing sound, be it from one speaker or all of them, start off by playing music continuously on your PCstick in a CD or play several repeating MP3 files, for instance. That gives you some background sounds to listen for as you fiddle with the settings, cables, connections, and programs. When you finally hear something coming from the previously dead speakers , you know you've found and fixed the problem.

Start troubleshooting by making sure you've plugged everything into the correct port. Then check the mixer settings (explained on Section 7.5.2) to make sure you turned on what you're trying to hear or record. Finally, check the master volume level (Section 7.5.3). If none of those work, a driver (Section 16.5.4) may be the culprit. Here's how to handle each step of sleuthing.

7.5.1. Finding the Right Port

By far the biggest problem with PC sound comes from pushing the right plug into the wrong port of the sound card. It's certainly easy to do, as most sound cards present a row of three or more identically shaped jacks , as shown in Figure 7-8. Confounding the problem further is their dark location in the back of your PC. Grab a flashlight, take a close look at the ports, and make sure you plugged your device into the correct jack. Figure 1-21 (Section 1.8.7) and the table below it show the identifying symbols etched next to each jack.

It's usually hard to tell which cable belongs to which speaker. After tracing a cable to its destination, make note of it. Wrap a piece of tape around the cable near the plug and write down what's on the other end of the cable: the front, rear, or middle pair of speakers; the microphone; or perhaps a camcorder or VCR.

Pushing a plug into the wrong port won't do any damage; it just won't work. If you're desperate, try the process of elimination : plug the thing into every port until you eventually hear your music.


Tip: When testing your speaker setup, look in your sound card's software for a Test or Calibration mode. The program shows a picture of your speaker setup onscreen, then sends a tone to each speaker, moving the tone slowly from speaker to speaker and showing you which one should be sending the sound. That helps you find speakers that aren't playing sounds, as well as helping figure out if you've reversed any of the speakers. Windows XP doesn't offer a built-in speaker test like this, unfortunately , so you need to rummage through your sound card's bundled software.
Figure 7-8. When plugging in a jack, look at the little symbol etched next to each jackspecifically, the little arrow on the symbol. If it points inward, the jack accepts sound, which means it's for a microphone or other sound-producing item. If the arrow points outward, it's a speaker jack. Some manufacturers put identifying colors next to each port on some newer cards; for example, Microphone = pink, Line In = blue, Speaker = green, and Digital = orange.

7.5.2. Adjusting the Mixer Settings

Your PC contains nearly a dozen things that can make noise, including its synthesizer, CD player, and microphone. Since your PC can play all of them at the same time, which should play the loudest? Windows XP's built-in mixer, shown in Figure 7-9, answers that question. The mixer provides a scaled-down version of the multitrack console found in every recording studio.

Figure 7-9. The mixer lists everything in your PC that's capable of making soundsa list that grows so large on some sound cards that half the mixer hangs outside your monitor's view. To trim it, remove some of the devices you don't usethe Telephone Answering Device, for instance, or the Line In and AUX ports. Choose Options Properties, and then turn off the checkboxes next to devices you dont use. The mixer removes them from view, shrinking its size accordingly .

To call up the mixer, choose Start Control Panel Sounds and Audio Devices and choose Advanced in the Device Volume area. Windows XPs mixer appears onscreen, showing you the current volume level of everything inside your PC that makes noise.

To control the volume of each item in your PC, slide the mixer's controls, shown in Figure 7-9. Slide them up to increase the volume and down to reduce the volume.

Check these settings when you're having trouble hearing or recording something:

  • If you spot an important item with the Mute checkbox turned on, Windows XP is keeping that sound out of the mix. If it's importantyour CD player, for instancemake sure the Mute box isn't turned on.

  • Conversely, if one of the items gives an annoying humthe Telephone Answering Device, for instancefeel free to turn on its Mute toggle.

  • When recording on your PC, usually through the microphone, choose Options Properties from the Mixer and turn on Recording. That makes the recording mixer appear, and it lists everything in your PC that is capable of recording. Since most PCs can record only one item at a time, be sure to turn on the checkbox for what you're trying to recordusually the microphone.

  • If you hear sound from only one speaker, check the balance setting: the little sliding bars along the mixer's top. Slide the balance control so it's in the center to send the sound equally to the left and right speakers.

7.5.3. Volume Level

Your PC lets you change its volume levels through its mixer, described above. But you can change the mother of all volume controls, its Master volume, in three additional ways.

  • CD drive . The CD drives on some older PCs offered a built-in headphone jack and volume controlthe rim of a little spinning wheel poking from the drive's front. If you're listening through the drive's headphone jack, be sure to give the little volume wheel a spin to make sure the volume's not turned down too far. Newer PCs don't use that volume setting, and instead control everything through Windows XP's mixer.

  • Master volume . The mixer settings let you adjust the proportional level of your PC's soundshandy for keeping your voice louder than your background music during a narrated slideshow, for instance. The master volume controls the loudness of the entire mix as a whole. To turn it off in a hurry, click the little speaker icon next to your taskbar's clock, and either turn on the Mute checkbox or slide down the volume control.


    Tip: No speaker icon near your taskbar's right end? Choose Start Control Panel Sounds and Audio Devices and turn on the "Place volume icon in the taskbar checkbox.
  • Speaker volume . Most speakers come with a built-in volume knob. If it's turned down, you won't hear anything, no matter how high you've cranked up your mixer. Look for the knob on your speaker and give it a turn to mid-volume.

You need to inspect all three of these volume settings because if only one's turned down, you won't hear anything.

7.5.4. Drivers

Once you rule out the main sound problem culpritsthe mixer, the mute toggle, and the cable portsthe next step is to check your sound card's drivers. They probably need to be updated or reinstalled (a process described on Section 16.5.4).

Before upgrading to a new driver, be sure to uninstall any software installed by your old adapter: choose Start Control Panel Add or Remove Programs to make Windows XP uninstall the unwanted goods.




PCs
PCs: The Missing Manual
ISBN: 0596100930
EAN: 2147483647
Year: 2005
Pages: 206
Authors: Andy Rathbone

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