snd_echo_digital_mode_switch 1467 sound/pci/echoaudio/echoaudio.c static const struct snd_kcontrol_new snd_echo_digital_mode_switch = { snd_echo_digital_mode_switch 2107 sound/pci/echoaudio/echoaudio.c if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_echo_digital_mode_switch, chip))) < 0)