Sound quality is an important standard for judging the quality of audio equipment, including signal to noise ratio, sampling bits, sampling frequency, total harmonic distortion and other indicators. The level of these parameters determines the sound quality of audio equipment.
Device type refers to the type of audio device, that is, the audio device belongs toPower amplifierMachine, speaker, multimedia console, digitalmixer, audio sampling card, synthesizer, medium and high frequency speaker, microphone, sound card in PC, earphone, etc.Here are some common audio devices.
Power amplifier
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The power amplifier issoundThe most basic equipment in the system, whose task is to amplify weak electrical signals from signal sources (in professional audio systems, it is from the mixer) to drivespeakerMake a sound.mixer
The sound mixing console is also called the sound mixing console. It amplifies, mixes, distributes, modifies the sound quality and processes the sound effect of multiple input signals. It is an important equipment for broadcasting and recording programs in modern radio broadcasting, stage amplification, sound program production and other systems.
The mixer can be divided into analog mixer and digital mixer according to the way of signal output.
Audio workstation
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Audio workstation is a set of audio recording, audio editing, internal effect processing, automaticdownmix The integrated professional audio workstation with functions such asoperating system, audio card and featuresSoftwareThree parts.The audio card is the coretechnologyThe function software is developed on the basis of the special development package provided by the audio card.
Synthesizer
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Synthesizers are all kinds of box devices connected to each other, and finally connected to a keyboard.When you press a keyboard, a unit containing a oscillator will make a sound, and some other box devices, a filter, will control the voice of the sound.One amplifier will controlvolumeEtc.
Troubleshooting
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The sound card status is normal, but all audio programs show no audio device symptoms: the sound card driver status in the system is normal, but all audio related programs show no audio device[1]。
Cause: unknown, often found in operating systems installed abnormally, such as depth, tomato garden, rainforest and woodwind.Confirm:
1. Right click the "My Computer" icon, select "Management" in the menu, and open "Computer Management"[1]；
2. Select "Device Manager" in "System Tools", and then open "Sound, Video and Game Controller"[1]；
3. Right click the sound card model and select "Properties"[1]；
1) The "Device Status" of "General" displays: "This device is operating normally. If there is a problem with this device, click" Troubleshooting "to start the troubleshooting."2) "Driver Provider", "Driver Date" and "Driver Version" of "Driver" are normal) Select "Multimedia Device" of "Properties" ->"Audio Device", the sound card model is below, click "Properties"[1]。
The status shown here is: The driver is enabled but not yet in use.Note: The above conditions must be met, otherwise the problem cannot be solved by the following methods.resolvent:
1. Click "Start Menu" ->"Run", enter: inf, and press Enter to open the drive installation information directory of the current system[1]；
2. Find the following machine.inf and copy it to another location, such as desktop[1]；
3. Use Notepad to open machine.inf, find the line ExcludeFromSelect=*, delete and save[1]；
4. Open "Start Menu" ->"Settings" ->"Control Panel" ->"Add Hardware", and select "Yes, I have connected this hardware (Y)" after searching, ->"Add a new hardware device" (located at the last item in the "Installed Hardware" list) ->"Install the hardware selected in my manual plex list (Advanced) (M)"->"Show all devices" ->"Install from disk"[1]；
5. "Source of copying manufacturer's files (C)" Here, select the previously modified machine.inf, and find the "PlugandPlaySoftwareDeviceEnumerator" whose manufacturer is "standard system equipment";Note: The left column does not need to be changed when selecting. Select this device from the right column
6. Click "Next" to complete the installation, and then reinstall the sound card driver for normal use[1]。
