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Neoretix Laboratory |
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How to fast turn my CD to MP3 |
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It
is very easy to turn audio CD to MP3 files with TubeHunter
Media Center, a perfectly ALL-IN-ONE media toolkit.
It converts any video files between all popular video
formats, and creates video DVD disc with any video files.
Besides, it converts any video file to iPOD, and converts
your favorite DVD movie to other video formats, or to
iPod. It also handles other useful jobs like FLV conversion,
video to sequenced images, extracting audio from a video
file. |
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Step
1 |
Start
TubeHunter Media Center, and select "CD
to MP3" |
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Step
2 |
Insert
an audio CD, then click on "Refresh" |
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Step
3 |
Click on "Start"
to rip CD to MP3 files. |
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Keywords
CD audio to MP3, CD to MP3, CD tracts to MP3, CD Rip,
Rip CD, CD Ripper |
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Audio
CD
The logical format of an audio CD (officially Compact
Disc Digital Audio or CD-DA) is described in a document
produced by the format's joint creators, Sony and Philips
in 1980. The document is known colloquially as the "Red
Book" after the color of its cover. The format is
a two-channel 16-bit PCM encoding at a 44.1 kHz sampling
rate per channel. Four-channel sound is an allowable option
within the Red Book format, but has never been implemented.
Monaural audio has no existing standard on a Red Book
CD; mono-source material is usually presented as two identical
channels on a 'stereo' track.
The selection of the sample rate was primarily based on
the need to reproduce the audible frequency range of 20
Hz - 20 kHz. The Nyquist–Shannon sampling theorem
states that a sampling rate of more than double the maximum
frequency of the signal to be recorded is needed, resulting
in a 40 kHz rate. The exact sampling rate of 44.1 kHz
was inherited from a method of converting digital audio
into an analog video signal for storage on U-matic video
tape, which was the most affordable way to transfer data
from the recording studio to the CD manufacturer at the
time the CD specification was being developed. The device
that turns an analog audio signal into PCM audio, which
in turn is changed into an analog video signal is called
a PCM adaptor. This technology could store six samples
(three samples per stereo channel) in a single horizontal
line. A standard NTSC video signal has 245 usable lines
per field, and 59.94 fields/s, which works out at 44,056
samples/s/stereo channel. Similarly, PAL has 294 lines
and 50 fields, which gives 44,100 samples/s/stereo channel.
This system could either store 14-bit samples with some
error correction, or 16-bit samples with almost no error
correction.
There was a long debate over whether to use 14-bit (Philips)
or 16-bit (Sony) quantization, and 44,056 or 44,100 samples/s
(Sony) or around 44,000 samples/s (Philips). When the
Sony/Philips task force designed the Compact Disc, Philips
had already developed a 14-bit D/A converter, but Sony
insisted on 16-bit. In the end, 16 bits and 44.1 kilosamples
per second prevailed. Philips found a way to produce 16-bit
quality using their 14-bit DAC by using four times oversampling.
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Copyright
© 1996 - 2009 by Neoretix Laboratory
All rights reserved |
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