DSD fans claim the format is as close to analogue as digital gets. Standard DSD recordings are still relatively rare compared with the PCM alternatives, and those higher-speed versions are extremely niche. There's even a DSD512 spec, though we've never heard any material encoded in it. Standard DSD is sometimes called DSD64 for this reason, with double- and quadruple-speed versions called DSD128 and DSD256 respectively. That resolution shortfall is made up by the very high sampling rate of over 2.8 million times a second – that’s 64 times the speed of CD. ![]() Compared with the over 65,000 different values 16-bit PCM has, the two values (0 if the new sample if the signal is lower or 1 if it’s higher) of DSD appear mighty limiting. DSD uses a single bit of information, and all this information tells us is whether the current sample of the analogue waveform is higher or lower than in the previous one.
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