SharpEars
Head-Fier
- Joined
- Feb 14, 2014
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- 17
I don't understand why several reviewers have found the USB input on the HA-1 lacking compared to its S/PDIF input. The HA-1 has asynchronous USB, so regardless of how jittery the incoming USB signal is, the HA-1 will reclock it to its internal clock. What is the perceived benefit of S/PDIF then, given that the S/PDIF carries along its own jitter from an external clock?
Perhaps HasturTheYellow can chime in on Oppo's official position to the following question:
What is the best way to send data to the HA-1, is it:
Link to sample review mentioning the S/PDIF advantage:
http://www.oppodigital.co.uk/UserFiles/Docs/Reviews/HFN_Oppo%20HA-1.pdf
Link to hiFace Evo USB to S/PDIF converter info:
http://www.m2tech.biz/evo.html
Perhaps HasturTheYellow can chime in on Oppo's official position to the following question:
What is the best way to send data to the HA-1, is it:
- Via Asynchronous USB, because the HA-1 has a high precision clock that will enable it to reclock a noisy/jittery USB signal and feed the high quality resulting waveform to the DAC chip or
- Take the USB output of the computer, send it to a high quality (expensive) external USB -> S/PDIF converter box such as the hiFace Evo. This device will remove most of the source jitter as part of the conversion, then feed the resulting clean S/PDIF signal into the HA-1
Link to sample review mentioning the S/PDIF advantage:
http://www.oppodigital.co.uk/UserFiles/Docs/Reviews/HFN_Oppo%20HA-1.pdf
Link to hiFace Evo USB to S/PDIF converter info:
http://www.m2tech.biz/evo.html