wtf is that! guys are u serious?
I wonder why I'm writing reports in D90 thread if no one take a little time to READ them CAREFULLY!
First the loud pops during rate change from DSD to PCM has been only seen on linux platform due certainly to the XMOS XU216, in other words other platform like Windows or on Mac using latest driver/firmware are okay!
Second using DoP has nothing to do with the pops/clicks problem.
In short:
DoP is DSD "encapsulated" in PCM format/header which means:
1. if the usb dac failed to read DSD then the stream is converted to PCM, no pops/click because WE DO NOT CHANGE RATE here this is from PCM to PCM!!!!!!!!!!! so could you please stop saying bullsh*t!
2. on usb DAC that support native DSD using DoP result to a pure DSD sound! and the pops/clicks issue remains during the rate change from DSD to PCM
I found something more specific about DoP on dCS website:
It involves taking groups of 16 adjacent 1-bit samples from a DSD stream and packing them into the lower 16 bits of a 24/176.4 data stream. Data from the other channel of the stereo pair is packed the same way. A specific marker code in the top 8 bits identifies the data stream as DoP, rather than PCM. The resulting DoP stream can be transmitted through existing 24/192-capable USB, AES, Dual AES or SPDIF interfaces to a DoP-compatible DAC, which reassembles the original stereo DSD data stream COMPLETELY UNCHANGED. If something goes wrong and the data stream is decoded as PCM, the output will be low-level noise with faint music in the back ground, so it fails safely. This can happen if the computer erases the marker code by applying a volume adjustment.
so please if you have an issue with your usb dac BE MORE SPECIFIC and give details on the context! OS, hardware, software, driver/firmware version...
thanks!
Cheers,
z