> >> do loopback module assume sink is not running when it start source capture? >> > Sink and source are started independently. Source data is discarded until the sink-input has > called pop() the first time.
But you cannot skip more than 9ms source data since you need 1ms( or 25ms fragment time when not using timer schedule mode) to capture If you are using usb as source and hda as sink, hda fifo trigger dma transfer whenever the fifo fill level is less than fifo threshold, you need to fill 256 bytes at first write to avoid fifo underrun
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