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1 .. zephyr:code-sample:: uac2-explicit-feedback
2 :name: USB Audio asynchronous explicit feedback sample
3 :relevant-api: usbd_api uac2_device i2s_interface
5 USB Audio 2 explicit feedback sample playing audio on I2S.
10 This sample demonstrates how to implement USB asynchronous audio playback with
14 The device running this sample presents itself to the host as a Full-Speed
15 Asynchronous USB Audio 2 class device supporting 48 kHz 16-bit 2-channel
21 Asynchronous USB Audio is used when the actual sample clock is not controlled by
22 USB host. Because the sample clock is independent from USB SOF it is inevitable
24 shorter than 1 ms according to audio source (USB host). In the long run, this
27 The host achieves the average by sending either nominal or nominal ±1 sample
30 The dummy feedback implementation, used when there is no target-specific
44 This sample in both modes (direct sample counting and indirect I2S buffer output
47 The sample defaults to indirect feedback calculation because direct sample
50 no extra connections are necessary and the sample can even be used without any
60 .. zephyr-app-commands::
61 :zephyr-app: samples/subsys/usb/uac2_explicit_feedback