SNDRV_CHMAP_TC
{ SNDRV_CHMAP_TC, TC },
[SNDRV_CHMAP_TC] = "TC",
SNDRV_CHMAP_TC, /* top */
SNDRV_CHMAP_TC, /* top center */
map = SNDRV_CHMAP_TC;
[VIRTIO_SND_CHMAP_TC] = SNDRV_CHMAP_TC,