mp3 audio recorder record from the compu

#MP3 AUDIO RECORDER RECORD FROM THE COMPU PDF#
#MP3 AUDIO RECORDER RECORD FROM THE COMPU PC#
#MP3 AUDIO RECORDER RECORD FROM THE COMPU SERIES#

Each compression method will have its own advantages and disadvantages. Competing compression methods have been developed to address various requirements, compressed music and compressed speech being two obvious examples. CompressionĮven in today's world of high speed Internet connections and enormous hard drives, audio files cannot be regarded as tiny or small. To summarize, each digital sound has three fundamental characteristics: the sample rate, the sample size and the number of channels. New systems may utilize up to 6 channels (Dolby 5.1) and even more. In the vast majority of the cases, the number of channels is either one (mono sound) or two (stereo sound). Each independent measurement point produces one channel. For example two microphones are generally needed to get stereo sound. To reflect the spatial properties of sound it must be measured in more then one place simultaneously. The last fundamental characteristic of the digital sound is a number of channels. Some newer audio devices are capable of working with the sample size of 24 bits. Again, CD quality recordings are done with a sample size of 16 bits and recording such as dictation are done with a sample size of 8 bits. So a 16 bit, sample size, provides much greater granularity and can represent the correct pressure much more accurately than an 8 bit sample size. A scale between 0 and 65,535 may be represented with 16 bits. A scale between 0 to 255 may be represented in 8 bits. The sample size indicates the size of the scale that will be used for each sample measurement and will usually either be 8 bits or 16 bits. Of course, a high sample rate means more data must be saved and the file size and disk space requirements increase accordingly.

A sample rate of 8.0 kHz would yield less than one fifth the samples of the CD quality recording and would be more suitable for dictation type applications than for recording music. Some proposed future audio devices can go as high as 96kHz. A sample rate of 44.1 kHz is used for most CDs, 48kHz - for DVD. The sample rate is measured in the number of thousands of samples per second and are expressed as a specific thousand of samples per cycle (second). The more samples per second, the greater the accuracy that will be achieved in reproducing the sounds, when they are re-played. The result of each measurement is called a sample. The frequency at which the measurements are taken is called a sample rate and the size of the integer (in bits) is called a sample size. This conversion is done by taking periodic measurements of the electrical signal and converting it to an integer value. The ADC can convert this electric signal to a sequence of ones and zeroes. The sound card in turn has a circuitry called an Analog-to-Digital converter or ADC. The microphone circuitry transforms this movement into a continuous and real-valued electric signal. The membrane on the mic moves back and forth according to the current air pressure. To understand how digitalization works, let us imagine a microphone plugged into a computer sound card.

#MP3 AUDIO RECORDER RECORD FROM THE COMPU SERIES#

Each wave has a discrete value of pressure associated with it and each of these possible values generates a different sound.īefore a computer can deal with sounds, the sounds must be converted to a series of ones and zeroes. By their nature, these sound waves are continuous. The human ear is capable of discerning these waves, provided that their frequency resides within the audible spectrum. The sounds created by the speakers are actually waves of compressed air. The speakers and sound card, in conjunction with the computer operating system, facilitate the playing of audio sounds (music, speech, bird calls, or any other noises) so the sounds can be heard by the end user.

#MP3 AUDIO RECORDER RECORD FROM THE COMPU PC#

Today, almost every PC comes equipped with a sound card and associated speakers.

#MP3 AUDIO RECORDER RECORD FROM THE COMPU PDF#

Download a copy of this Primer on PC Audio in PDF format.Transfer of Audio from LPs and Cassettes to CDs.This page provides an introduction to various issues associat ed with PC based audio technology.

Mp3 audio recorder record from the compu