Hi Xuebing, > Would you mind to share how did you run the test for both > Playback/Capture? What host version are you using, as different Host > enumerates (sends sequences of USB_REQ_SET_INTERFACE request differently)?
sure, on client side (BBB) I have a jackd on top alsa running and connected capture and playback ports together. On host side I use a Linux Kernel 3.16.1 and forward the gadget usb with alsa_in and alsa_out to a jackd pipe with another usb interface (focusrite UAC2). regards, Sebastian
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