noise on USB audio on RPI 4B

i had the same problem with C-Media usb dac's. so i switched to StarTech and have had no problems since. relevent portion of dmesg follows: uaudio0 at uhub5 port 2 configuration 1 interface 1 "Speed Dragon USB Advanced Audio Device" rev 2.00/1.04 addr 9 uaudio0: class v1, full-speed, sync, channel

Re: noise on USB audio on RPI 4B

https://www.amazon.com/StarTech-com-Sound-SPDIF-Digital-Stereo/dp/B00F7120TQ/ref=sr_1_4?crid=2DCWMU5DGRVNH&dchild=1&keywords=startech+usb+audio+adapter&qid=1620751731&sprefix=starttech+usb+audio+adapter%2Caps%2C221&sr=8-4 thats the one i use with no problems. hope that helps!