1What: /config/usb-gadget/gadget/functions/uac1.name 2Date: June 2017 3KernelVersion: 4.14 4Description: 5 The attributes: 6 7 c_chmask - capture channel mask 8 c_srate - capture sampling rate 9 c_ssize - capture sample size (bytes) 10 p_chmask - playback channel mask 11 p_srate - playback sampling rate 12 p_ssize - playback sample size (bytes) 13 req_number - the number of pre-allocated request 14 for both capture and playback 15