/proc/asound/UMC204/stream0

BEHRINGER BEHRINGER UMC204 at usb-0000:00:16.2-4, high speed : USB Audio

Playback:
  Status: Running
    Interface = 1
    Altset = 1
    Packet Size = 135
    Momentary freq = 47984 Hz (0x5.ff80)
    Feedback Format = 16.16
  Interface 1
    Altset 1
    Format: S32_LE
    Channels: 4
    Endpoint: 1 OUT (ASYNC)
    Rates: 44100, 48000, 88200, 96000
    Data packet interval: 125 us

Capture:
  Status: Running
    Interface = 2
    Altset = 1
    Packet Size = 67
    Momentary freq = 48000 Hz (0x6.0000)
  Interface 2
    Altset 1
    Format: S32_LE
    Channels: 2
    Endpoint: 2 IN (ASYNC)
    Rates: 44100, 48000, 88200, 96000
    Data packet interval: 125 us