Now here's the kicker: This doesn't cure the clicks or pops! When I disable the NVIDIA GeForce 320M under Device Manager -> Disable the latency drops down to around 80us (almost a factor 20). With the latest graphics driver installed the latency is around 1500us (seriously, that's onethousandfivehundred us). I've measured latency with LatencyMon and DPC Latency Checker, and both indicate a well known latency issue with the NVIDIA drivers. The USB module in question is the XMOS DSD DXD 384kHz high-quality USB to I2S/DSD PCB from diyinhk ( XMOS DSD DXD 384kHz high-quality USB to I2S/DSD PCB - DIYINHK) and it's powered by a clean 3.3V source. The music files are stored on a WD M圜loud NAS that is connected to the Mac Mini through a Gigabit LAN connection. Hardware is a Late 2011 Mac Mini with an Intel Core 2 Duo P8800 (2.66GHz), 8 GB RAM, 250GB SSD, NVIDIA GeForce 320M graphic card, the operating system is Win 7 64bit SP1 with Boot Camp. So I've build this lovely DAC: only to find out that it's producing clicks and pops with audio replay over XMOS USB (I2C).
0 Comments
Leave a Reply. |