Today’s audiophiles and music lovers have wide arrays of options when it comes to music listening and recording. The latest innovations in home audio are Super Audio Compact Disc and DVD-Audio. Each of this has its distinct leap from present CD format technology, in which, each comes with its own great quality sound and storage capacity.
The underlying difference between normal CD versus SACD technology is how the data are encoded. CD format and DVD format make use of the digital encoding of analog signals through the so-called PCM process or pulse code modulation. PCM takes on the digital snapshots of an analog signal wave from varied points within the wave’s motion.
The CD player then reads the corresponding data found on a compact disc, after which, it converts the snapshots back to sound waves. This is done by interpolating the approximate values in accordance with the waveform and loading them between the “snapshots” acquired by the pulse code modulation process, which is then depicted as music by the amplifier.
Meanwhile, DVD-Audio has finer PCM potential as compared to the existing CD format. Compact discs offer 44.1 kHz, 16 bit, and two-channel data; while the DVD-Audio provides a sampling speed of 96 kHz, 24 bit, and six channel data or two channels with 129 kHz.
Additionally, DVD-Audio provides a storage capacity with seven times more than the current compact disc technology. Such add-on capacity may be used for lengthy recordings, or advanced quality sound, plus visual contents that are accessible via PC-liner notes or television, artist bios, video clips, photo galleries, or song lyrics.
SACD has a newer technology which Philips and Sony are pushing call Direct Stream Digital or DSD. This DSD technology offers better music resolution because the music is closer to the original waveform. It is no longer approximated like the older method.
SACD using the DSD technology is able to recorded the music at higher sampling rates. It no longer has to interpolate the data to contain the sound waves like PCM methodology.
In theory, the sound reproduction of SACD should be better. But another advantage is the higher storage capacity of the SACD.
When comparing the sound quality of the music, SACD is warmer and smoother because the DSD capture more musical data than the Pulse Code Modulation (PCM). The sound is fresher and reproduces a better amibience.
Moreover, such unprecedented sonic realism is enhanced further by multichannel SACD’s. Some of these are taped in two channel stereos, but lots have taken advantage of its ability to stow music up to six discrete channels. Above all, multichannel SACD is highly designed for ultra compatibility with home theater system comprised of the average 5.1 channel.
Although much better in sound quality and reproduction, the cost of new audio equipment may be slightly out of some people’s budget. The great thing about SACD and DVD-Audio players is that they also can play CD and DVD-Video formats. No need to double up in equipment.
The dissimilarity between a normal CD versus SACD technology is quite obvious. But either way, both are considered as a “step up” on what people were buying from the yesteryears.
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