Its probably jitter from the transport. If the transport had low jitter, it might even be better than the Sony. Also, your digital cable could be contributing.
IMO, you can replace the cable with a Ridge Street Audio Poiema in 1.5m length and use a different transport or reclock the transport and get good results. Never use less than 1.5m for a digital cable:
http://www.positive-feedback.com/Issue14/spdif.htm
Have you tried the Sony driving the DAC3 with S/PDIF coax?
Steve N.
Empirical Audio
IMO, you can replace the cable with a Ridge Street Audio Poiema in 1.5m length and use a different transport or reclock the transport and get good results. Never use less than 1.5m for a digital cable:
http://www.positive-feedback.com/Issue14/spdif.htm
Have you tried the Sony driving the DAC3 with S/PDIF coax?
Steve N.
Empirical Audio