Weird...the USB sound issues were supposed to be fixed a long time ago. Usually the -a options fixed the occasional popping noises...
Highest I ever had to use was -a 160:4
Can you perhaps try switching to wireless instead of LAN? Or try a cheap USB sound stick?
I'm running Squeezeplug 7.02 with a cmedia usb soundstick and have occasional plops, my other Pis are running with HiFiBerry DACs and PiCorePlayer, no problems at all there with the
-o option set for the i2s DAC with "hw:CARD=sndrpihifiberry"
No -a settings needed in that setup either. I'll soon upgrade my Squeezeplug server pi with a hifiberry as well, that will get rid of the last sound issues...
I'm also using upsampling on the PiCorePlayer units, my 44.1KHz run at 176KHz and CPU load stays at about 20%.
Not sure I hearing any difference though...
