xduoox3ii: Add "Super Slow" filter roll-off

I'm not happy with the proliferation of filter-roll-off options
but I don't have a less ugly solution.

Change-Id: I740fca006fa0c3443a467acfea55b6574d48346b

1 files changed, 2 insertions, 1 deletions

diff --git a/firmware/drivers/audio/xduoolinux_codec.c b/firmware/drivers/audio/xduoolinux_codec.c
index 749d551739..3a25f6f7cf 100644
--- a/firmware/drivers/audio/xduoolinux_codec.c
+++ b/firmware/drivers/audio/xduoolinux_codec.c
@@ -238,7 +238,8 @@ void audiohw_set_filter_roll_off(int value)
     /* 0 = Sharp;
        1 = Slow;
        2 = Short Sharp
-       3 = Short Slow */
+       3 = Short Slow
+       4 = Super Slow */
 #if defined(XDUOO_X3II)
     long int value_hw = value;
     alsa_controls_set_ints("AK4490 Digital Filter", 1, &value_hw);