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Speakers and SoundSound is one of the favorite options on today's PCs. In fact, sound is a standard feature of most new PCs. Everyone has their own uses for sound. You may just want to play a few music CDs with your CD-ROM drive while you are working, or you may use multimedia applications for presentations or educational programs. You may just like the sound of your jet engines roaring as you punch the throttle in a flight simulator. This chapter explains the basics of sound in Windows and shows you how to get the most sound out of your PC. Sound Cards Sound cards plug into an expansion slot in your PC. The card has a set of connectors that are exposed on the back of the PC; you can plug a microphone and speakers into the connectors. Some cards include an optional connector for a line input, which is used to connect another input source such as the output from a tape player or portable CD player. Other optional connectors can include a joystick connector and a MIDI connector (for connecting a MIDI keyboard). The card may include a volume control, which controls the volume of the speakers and/or headphones. SpeakersThe built-in speakers in most PC cases are used just for making system sounds, such as warning beeps and action indicators. To play more sophisticated sounds on your PC, you need a set of external speakers. Usually speakers come in pairs, and there is a plug that connects them to your sound card. Arrange the speakers with one on the left and one on the right of your desk or work area to get a stereo effect. Optionally, some speakers come with a subwoofer. This improves the bass (low notes) sound. If you have a subwoofer with your speakers, it should go on the floor under your desk.
Playing Sounds for Windows EventsBy default, Windows 95 plays a sound when it starts and when it closes. You can change the sounds that are played for these events, and you can assign sounds to be played for other events. To do this, follow these steps:
Playing WAV Sound Files on Your PC You're not limited to the built-in event sounds that came with your operating system; you can play other types of sound files as well. WAV files are the most common type of PC sound file. Windows has a built-in player, called Sound Recorder, for playing WAV files. To play a WAV file, use Explorer or My Computer to find the file you want to play, and double-click it to start it. Sound Recorder starts, and the WAV file begins playing immediately . When the file is finished playing, Sound Recorder closes automatically. If you want to stop the playback, rewind it, and play it again, click the Stop button before it finishes playing. Once you click stop, you can play and rewind it as much as you want and the player won't close when the sound is finished playing. You'll see how to use this same application to record your own sounds later in the section "Recording Sounds in Windows 95." Getting New SoundsIf you are really into sounds and want more on your PC, there are several ways to get more sound files. The Windows CD-ROM installation includes many additional sound schemes, which you can add by using the Add/Remove Programs option in the Control Panel. You can also buy any of a number of CD-ROMs that contain whole collections of additional sounds in the WAV format. And, you can find thousands of sound clips on the Internet. Playing Music on Your PCWith a CD-ROM, sound card, and speakers, you can use your $2,000 PC like a $100 CD player. The sound probably won't be as good as your home stereo, but it is more convenient than setting up a stereo with your PC. To use your computer to play audio CDs, put a CD into the CD-ROM drive. If your computer has AutoPlay features (as do all Windows 95 systems), it will automatically detect the CD and start the Windows CD player.
Adjusting the Speaker Volume and Tone in Windows 95There are three ways to adjust the volume to your speakers. First, you can just adjust the volume control on the speakers themselves. See the instruction manual that accompanied your speakers to find the specific location of and adjustment instructions for the volume controls on your speakers. Within Windows, you can also adjust the speaker volume by clicking the speaker icon in the taskbar to bring up the volume control Drag the slider up or down to adjust the volume, or click the Mute box to turn the speakers off all together. This Mute option is what you want to use if you are listening to a CD on headphones and don't want it to play on the speakers. If you want more control over the speaker output, click the speaker icon in the taskbar with the right mouse button and select Volume Controls from the menu. This opens the Volume Control dialog box The control at the far left is the master volume control. It controls the overall volume going to the speakers. Above it, you can adjust the balance to the left and right speakers. Because the sound in your PC can come from several different sources, the Volume Control dialog box also provides controls for adjusting the relative volume of each of those sources. These sources are:
From the Volume Control dialog box, you can also control the bass and treble settings for your speakers. This adjustment is made for all sound, though, and doesn't differentiate between different sound sources. To adjust bass and treble settings, follow these steps: Listening to Your CDs on HeadphonesMost CD-ROM drives have a headphone built-in jack and a volume control on the drive itself. To listen to a CD on the headphones instead of playing it over the speakers, follow these steps: If your CD player doesn't have a volume control dial on it, you can use Windows to control the volume to the headphones. Follow these steps:
MicrophonesYour computer may have come with a microphone. The microphone plugs into the sound card and is used to record your voice or other sounds. Another new use of a microphone is to make telephone-like conference calls over the Internet. Like any conference call, when you speak into the mic, the person you call hears you on his speakers. Recording Sounds in Windows 95The most common way to record a sound in Windows is by using a microphone. To do this, be sure the microphone is plugged into the microphone input jack on your sound card. If your mic has an on/off switch, be sure it is on. Then follow these steps: You can also easily record a sound clip from a CD. To do this, follow these steps:
Adjusting Microphone and Input Levels in Windows 95To control the level of incoming sounds from the microphone and other devices for recording, follow these steps:
Troubleshooting Sound Problems in Windows 95Sound problems are common in Windows 95 and here are some common problems and solutions. No Sound from the SpeakersCheck to be sure that the speakers are plugged into the correct speaker output jack on the sound card and that the speakers are plugged into the power source or have live batteries. If there are volume controls and an on/off switch on the speakers, be sure the controls are turned up and the speakers are turned on. Does the sound card have a volume control dial where the speakers plug into it? If so, are these volume controls turned up? Check the volume control to be sure that the Windows volume to the speakers isn't turned down too low and that the speakers aren't muted. Check the volume controls as shown to be sure the volume isn't turned down or off there. No Sound from Speakers When an Audio CD Is PlayingCheck the volume controls as shown to be sure the CD volume isn't turned down or off. There is a cable inside your PC that connects the CD-ROM audio to the sound card. If your PC wasn't assembled professionally or you added the CD-ROM or sound card yourself, check to be sure that this cable is there and connected properly. Can't Record with the MicrophoneCheck to be sure that the microphone is connected to the mic input jack on the sound card. It should not be connected to line in. If there is an on/off switch on the mic, check that it is in the On position. Check the recording level controls in to be sure your microphone recording level is on. Background Music in Games and Multimedia Doesn't PlayIf all of your other sounds play okay, the problem may be with your MIDI volume. MIDI is a type of synthesized (rather than recorded) music used in a lot of games and multimedia. Check the settings to be sure the MIDI volume isn't down or off. Raise the volume for that if needed. Many games and multimedia programs also use CD audio mixed in with the other sounds. If these seem to be missing, run through the checklist of solutions for the previous problem, "No Sound from Speakers When an Audio CD Is Playing." There are two different kinds of sound technologies for playing synthetic MIDI sounds. One is called FM synthesis and is used in older and less expensive sound cards. It tends to make all of the instruments sound the same. The better technology is called wavetable synthesis. If you are really particular about the quality of your sound in games and multimedia, you may want to upgrade to a wavetable sound card or see if a wavetable add-on is available for your current card. Is your $200 sound card connected to $5 speakers? A better set of speakers may be the answer. |
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