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3 years ago

How does a sound card work?

2 answers:

8 0

In order to be able to listen to your music, a sound card converts digital data to analog sound waves you can hear. The output signal is then connected to a headphone or set of speakers. You can also use a sound card to record audio with a microphone

lesya692 [45]3 years ago

4 0

The motherboard on most computer systems has an integrated sound card, which is often sufficient for many users. However, to get higher quality sound you can upgrade to a separate sound card, which uses better and more expensive components.

Audio files on a computer consist of digital data just like any other file on a computer. Sounds we can hear consist of waves that travel through the air - sounds are analog. The primary function of a sound card is to translate between digital and analog information, just like a video card. Sound cards typically have four major components:

The digital-to-analog converter (DAC), which makes it possible to convert digital data to analog sound
The analog-to-digital converter (ADC), which makes it possible to make digital recordings from analog sound inputs
An interface to connect to the motherboard, typically using Peripheral Component Interconnect (PCI)
Input and output connectors so you can plug in headphones, speakers or a microphone - many computer systems have speakers and microphone built-in, but connectors allow you to use higher quality external devices to play or record sound
On some sound cards, the two types of converters are integrated into CODEC a single coder/decoder chip. Some sound cards also have a digital signal processor (DSP), a built-in processing unit. The DSP takes some of the load of the central processing unit (CPU) to convert between digital and analog. Similarly, some sound cards have their own memory. Sound cards without a DSP or memory will use the motherboard's CPU and memory.

Computer systems typically have built-in speakers, which are reasonably good if you don't turn up the volume too high. If you want to use your computer for some serious music for a party, you probably want to connect a set of external speakers. Relatively small external speakers can be powered using a USB connection, while larger ones need their own power supply. Similarly, most computer systems have a built-in microphone, but you can also connect an external microphone.

Serious audiophiles who use their computer as their sound system will typically upgrade to a high-end sound card, a set of good external speakers, and a good external microphone (if they want to make their own recordings). A high-end computer system can rival dedicated music equipment. In general, with the improvements in sound and video, computer systems have turned into multimedia systems rather than simply computing devices to run software.

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Return a version of the given string, where for every star (*) in the string the star and the chars immediately to its left and

lana [24]

Answer:

Explanation:

The following code is written in Java and uses a for loop with a series of IF ELSE statements to check the next and previous characters in a string. Checking to make sure that there are no asterix. If so it adds that character to the String variable output. Which is returned to the user at the end of the method. Two test cases have been created and the output can be seen in the attached image below.

class Brainly {

public static void main(String[] args) {

System.out.println(starOut("sm*eilly"));

System.out.println(starOut("ab**cd"));

}

public static String starOut(String str) {

String output = "";

for (int i = 0; i < str.length(); i++) {

if ((i != 0) && (i != str.length()-1)) {

if ((str.charAt(i-1) != '*') && (str.charAt(i+1) != '*') && (str.charAt(i) != '*')) {

output += str.charAt(i);

}

} else {

if ((i == 0) && (str.charAt(i) != '*') && (str.charAt(i+1) != '*')) {

output += str.charAt(i);

} else if ((i == str.length()-1) && (str.charAt(i) != '*') && (str.charAt(i-1) != '*')) {

output += str.charAt(i);

}

return output;

}

4 0

3 years ago

In rolling a die four times, what is the odds that at least one 5 would appear?

Ronch [10]

Answer:

The probability that at least one 5 will appear in 4 rolls of die equals $\frac{671}{1296}$

Explanation:

The given question can be solved by Bernoulli's trails which states that

If probablity of success of an event is 'p' then the probability that the event occurs at least once in 'n' successive trails equals

$P(E)=1-(1-p)^{n}$

Since in our case the probability of getting 5 on roll of a die equals 1/6 thus we have p = 1/6

Applying the values in the given equation the probability of success in 4 rolls of die is thus given by

$P(E)=1-(1-1/6)^{4}=\frac{671}{1296}$

4 0

3 years ago

Pictures that you can click on to tell your computer what to do.

Tom [10]

What do you mean ? I’m confused..

6 0

3 years ago

Read 2 more answers

Modify an array's elements Write a for loop that iterates from 1 to numberSamples to double any element's value in dataSamples t

ValentinkaMS [17]

Answer:

See explaination for program code

Explanation:

%save as AdjustMinValue.m

%Matlab function that takes three arguments

%called number of samples count, user samples

%and min vlaue and then returns a data samples

%that contains values which are double of usersamples

%that less than min vlaue

function dataSamples=AdjustMinValue(numberSamples, userSamples, minValue)

dataSamples=userSamples;

%for loop

for i=1:numberSamples

%checking if dataSamples value at index,i

%is less than minValue

if dataSamples(i)<minValue

%set double of dataSamples value

dataSamples(i)= 2*dataSamples(i);

end

Sample output:

Note:

File name and calling method name must be same

--> AdjustMinValue(4, [2,12,9,20],10)

ans =

4 12 18 20

3 0

3 years ago

¿por que la toria de lamarck sobre el alargamiento del cuello de las jirafas por el esfuerzo continuado no pasara a sus descendi

Paha777 [63]

Respuesta: Los caracteres adquiridos no se transmiten genéticamente porque no modifican el ADN de los organismos

Explicación:

Jean-Baptiste Lamarck al igual que Charles Darwin, propuso una teoría sobre la evolución que explicaba cambios en los organismos a través del tiempo. La teoría de Lamarck se enfocaba en condiciones en el ambiente que propiciaban cambios en los organismos. Un ejemplo de esto son las jirafas, que de acurdo a Lamarck tenían cuellos largos debido al esfuerzo continuado para comer hojas de árboles altos. Esto significa que la característica de cuello largo era adquirido por las jirafas durante su vida y según Lamarck se transmitiría a sus descendientes.

Sin embargo, se ha comprobado que los caracteres adquiridos no modifican el ADN de los organismos, por ejemplo las cirugías estéticas no cambian el ADN de una persona y por esta razón no son transmitidos a sus descendientes. Por el contrario, en las poblaciones de organismos ciertas características prevalencen en el tiempo debido a la selección natural. Esto significa que el cuello de las jirafas es el resultado que el cuello largo sea una característica beneficiosa que ha prevalecido debido a la selección natural y no de características adquiridas que son transmitidas a descendientes.

7 0

3 years ago