It is funny for a mere electronic component to be worshiped like an object of religion, but this chip is such rare case. 600-199 SCYBER PDF DIR9001+TDA1541A Classic NOS DAC A switched capacitor DAC circuit is used in the final stage, and each stage has anti-jitter performance exceeding that of previous 1-bit Bitstream DACs.Įach CS has a dual channel structure. However, the SA-1 uses four TDA circuits per channel, each of which performs a single clock data shift in order to move quantized noised components beyond audible frequencies.ĭuring Super Audio CD playback the 2. This added the solid feeling of depth found in the multi-bit DACs to the highly praised smoothness and spaciousness of the Bitstream DAC, making it even more desirable. This however was not utilized in any Marantz CD players. Thus, the current worldwide trend towards cost reduction supports the development of Bitstream DAC. Although the linearity of bit DACs is impeccable, production costs are a big drawback. This concludes the history of the Philips multi-bit digital audio DACs. In addition, a variety of other technologies have been used during the process of converting the digital signal back to analog. In other words, the unit was engineered on the premise that the signal output from the CD player would be completely linear and receive no phase correction. Since actual production of the TDAA S2 has stopped long before, the number of players that could be produced using this device was limited from the start.Īctually, since the phase characteristic could also be calculated, the digital filter was used to calculate the pass-through characteristics of the analog low-pass filter and its phase correction.
In fact, previous "select" product levels were ealisy exceeded through improvements in the manufacturing process and manufacturing precision of the device. From the audiophile point of view, the TDAA S1 was a unique experiment that tested the performance limits of current device technology. Makers often release these kinds of special "select" devices. At about the same time, Philips, who was manufacturing the devices, proposed a special "select" version of the TDAA that had a particularly high rate of conversion precision. At the time, the filter characteristics of Japanese products were set as high as the 9th or 11th order, and the superb sound quality of the Marantz products was overwhelming.
When the Marantz CD went on the market, the effect of noise shaping imposing frequency characteristics onto distribution of quantized noise in order to shift noise component to an ultra-high ranges that are difficult to hear with the naked ear was lagerly unknown.Īnalog filters built into the analog output circuits after the DACs were set for smooth 3rd order slopes with particular attention given to regularity of the phase characteristics. The SAA with a 4x over sampling filter capacity utilizes a top quality noise shaping circuit called a secondary noise shaper. In actual fact, the secret to the excellent sound produced by the Philips SAA digital filter incorporated into the TDA is not obvious at first. In the Red Book, which defines CD standards, the resolution is quoted as being 16 bit. Stochastic it is and stochastic it will be, read on. I kept the DEM clocks separate as of erins tip. Some have done it with everyting separate, even the decoupling caps.