Sony CDP-797
Little is documented about the Sony CDP-797, which period reviews also call the CDP-797ESD. What the record shows comes almost entirely from an Audio review (????, p.48). It noted that the player used true 18-bit D/A conversion with eight-times oversampling. The reviewer found the player technically remarkable. It was among the first Sony players to combine true 18-bit D/A conversion with eight-times oversampling. That made for an unusually dense data stream and better linearity than earlier four-times-oversampling designs.
The reviewer noted in Audio (????, p.53) that the player had no English owner's manual. Even so, the full feature set could be figured out without trouble, including the time readouts (track, total, remaining) and the programming functions. Measured performance was exceptional. With a quiet test-disc track playing, the overall signal-to-noise ratio was the highest the reviewer had ever seen, at 115 dB unweighted and 118 dB A-weighted.
- True 18-bit digital-to-analog conversion
- Eight-times oversampling
- Signal-to-noise ratio: 115 dB unweighted, 118 dB A-weighted (measured by Audio)
- Display modes: track time, total time, remaining time; programming readouts
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