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CONFIG_SND_ALOOP: Generic loopback driver (PCM)

General informations

The Linux kernel configuration item CONFIG_SND_ALOOP:

Help text

Say 'Y' or 'M' to include support for the PCM loopback device. This module returns played samples back to the user space using the standard ALSA PCM device. The devices are routed 0->1 and 1->0, where first number is the playback PCM device and second number is the capture device. Module creates two PCM devices and configured number of substreams (see the pcm_substreams module parameter).

The loopback device allows time sychronization with an external timing source using the time shift universal control (+-20% of system time).

To compile this driver as a module, choose M here: the module will be called snd-aloop.

Hardware

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