snd_mixart_add_ref_pipe
pipe = snd_mixart_add_ref_pipe(chip, pcm_number, 0, 0);
pipe = snd_mixart_add_ref_pipe(chip, pcm_number, 1, 0);
struct mixart_pipe *snd_mixart_add_ref_pipe(struct snd_mixart *chip, int pcm_number, int capture, int monitoring);
snd_mixart_add_ref_pipe(chip, MIXART_PCM_ANALOG, 0, 1);
snd_mixart_add_ref_pipe(chip, MIXART_PCM_ANALOG, 1, 1);