Frequently Asked Question

DSD512 - How is it transmitted?
Last Updated 2 years ago

Question: How is DSD512 transmitted?

Answer: Using DoP DSD is sent as a 16 bit chunk per PCM sample.

So DSD(64) requires 4 PCM samples to hold 64 DSD bits and thus it needs to be send as 176.4kHz PCM.

And thus DSD128 via DoP requires 352.8kHz PCM and DSD256 via DoP requires 705.6kHz PCM.

Only via ASIO (native) is DSD sent at the DSD sample rate, though under the bonnet it is send in effect as 32 bit per PCM sample, so 705.6kHz allows 22.57M DSD sample rate (DSD512).

The key difference between ASIO native and DoP is the way DSD signals are identified and how many bits are available per sample.

ASIO has a mechanism separate from the data to signal DSD and uses 32 bit per PCM sample.

For DoP the DSD marker is embedded in the PCM data stream and only 24 bit are used of which 8 bit are used as DSD marker.

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