arecord: main:788: audio open error: Device or resource busy

Hii…

When I try to test my connected USB mic using the command given in the lecture, I get the following error



“arecord: main:788: audio open error: Device or resource busy”



Please help me… I am using a USB mic & 3.5mm speaker is connected to the 3.5mm audio jack.



Pl note that mic is detected by pi.



Also, when I run ps -A nothing else is using my USB mic



Thank You,



Akshay