uaudio_mixer_get_input
input[0] = uaudio_mixer_get_input(iot, 0);
input[1] = uaudio_mixer_get_input(iot, 1);
input[0] = uaudio_mixer_get_input(iot, 0);
input[1] = uaudio_mixer_get_input(iot, 1);
static const struct uaudio_terminal_node *uaudio_mixer_get_input(