 In a 2014 study, however, Marui et al.found that under double-blind conditions, listeners were able to distinguish between PCM (192 kHz/24 bits) and DSD (2.8 MHz) or DSD (5.6MHz) recording formats, preferring the qualitative features of DSD, but could not discriminate between the two DSD formats.The Sony SCD-1 player was introduced concurrently with the SACD format in 1999, at a price of approximately US$5,000.