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Classé SSP-800 & DSD?
Will the Classé SSP-800 support DSD in it's original form?
SACD is a two-layer hybrid disc, one layer containing traditional "Red Book Audio" 16bit / 44.1kHz CD standard so that the new disc can still be played on standard CD players and a second high-density layer, which can be played on a SACD player offering the ultimate quality in 2 channel (stereo) and multi-channel (6 channel or surround) with a frequency response of DC to 100kHz and a dynamic range greater then 120dB. The high-density layer also can be used to store text, graphics and video information creating a multimedia performance during playback.
Along with the sonic improvements, SACD also offers an active copyright management system, a copyright identification system and both visible and invisible digital watermarking and is the perfect medium for archiving
Direct Stream Digital (DSD) Encoding
DSD is the technology used to record and produce audio content on the SACD. DSD is a 1-bit representation of the audio waveform with 2.8224Mhz of sampling. This allows SACD to achieve its unprecedented audio quality allowing it to reproduce audio better then any other digital or analog technology.
SACD is a two-layer hybrid disc, one layer containing traditional "Red Book Audio" 16bit / 44.1kHz CD standard so that the new disc can still be played on standard CD players and a second high-density layer, which can be played on a SACD player offering the ultimate quality in 2 channel (stereo) and multi-channel (6 channel or surround) with a frequency response of DC to 100kHz and a dynamic range greater then 120dB. The high-density layer also can be used to store text, graphics and video information creating a multimedia performance during playback.
Along with the sonic improvements, SACD also offers an active copyright management system, a copyright identification system and both visible and invisible digital watermarking and is the perfect medium for archiving
Direct Stream Digital (DSD) Encoding
DSD is the technology used to record and produce audio content on the SACD. DSD is a 1-bit representation of the audio waveform with 2.8224Mhz of sampling. This allows SACD to achieve its unprecedented audio quality allowing it to reproduce audio better then any other digital or analog technology.
The main problem with standard PCM technology is that it requires both steep (brick wall) filters to block frequencies above 20kHz (specifically at 22.05kHz) which is difficult to build. It also requires the addition of re-quantization noise for its decimation (down-sampling) digital filters and interpolation (up-sampling) digital filters. These problems limit the actual fidelity of the reproduced audio.
DSD simply removes all the filters and records the audio directly in its 1-bit, 64x over-sampled delta sigma modulated form.
Using a negative feedback, if the input waveform, accumulated over one sampling period, rises above the value accumulated in the negative feedback loop during previous samples, the converter outputs a digital "1." If the waveform falls relative to the accumulated value, a digital "0" is output. As a result, full positive waveforms will be all 1s. Full negative waveforms will be all 0s. Alternating 1s and 0s will represent the zero point
The resulting pulse trains "looks" remarkably like the audio waveform that it represents. Furthermore digital to analog conversion can be as simple as running the pulse train through an analog low pass filter!
Sony and Philips designed DSD to capture the complete information of today's best analog systems. The best 30ips half-inch analog recorders can capture frequencies past 50 kHz. DSD can represent this with a frequency response from DC to 100 kHz. To cover the dynamic range of a good analog mixing console, the residual noise power was held at -120 dB through the audio band. This combination of frequency response and dynamic range is unmatched by any other recording system, digital or analog.