So if I understood yours well, fully automatic switching is not directly
supported by The ALSA. And very probably, there is currently no free or
opensource solution for ALSA Linux user than manually finding name of USB
connected device and switching to it. It would be very interesting
programmers experiment to develop daemon, which would automatically switch
between output devices if some new device will be added. But very probably,
this is not so simple as it could seems to Me. Thank you very much for yours
kind answer on my question.
But ALSA is still my favourite sound server. It is true, that I do not
manipulate with output devices so often and The fastest responsiveness of
audio device is always The device, which is internally connected to PCI not
to USB port.
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