diff --git a/firmware/drivers/audio/wm8721.c b/firmware/drivers/audio/wm8721.c
index 1740a48d18..6c4e12b9dc 100644
--- a/firmware/drivers/audio/wm8721.c
+++ b/firmware/drivers/audio/wm8721.c
@@ -160,12 +160,6 @@ void audiohw_close(void)
     wmcodec_write(PDCTRL, 0xff);
 }
 
-/* Change the order of the noise shaper, 5th order is recommended above 32kHz */
-void audiohw_set_nsorder(int order)
-{
-    (void)order;
-}
-
 void audiohw_set_sample_rate(int sampling_control)
 {
     int rate = 0;
diff --git a/firmware/drivers/audio/wm8731.c b/firmware/drivers/audio/wm8731.c
index c4376ff34a..d96701ca9d 100644
--- a/firmware/drivers/audio/wm8731.c
+++ b/firmware/drivers/audio/wm8731.c
@@ -204,23 +204,6 @@ void audiohw_close(void)
     /* 2) Remove the WM8731 supplies. */
 }
 
-void audiohw_set_nsorder(int order)
-{
-    static const unsigned char deemp[4] =
-    {
-        DAPCTRL_DEEMP_DISABLE,
-        DAPCTRL_DEEMP_32KHz,
-        DAPCTRL_DEEMP_44KHz,
-        DAPCTRL_DEEMP_48KHz
-    };
-
-    if ((unsigned)order >= ARRAYLEN(deemp))
-        order = 0;
-
-    wm8731_write(DAPCTRL,
-        (wm8731_regs[DAPCTRL] & ~DAPCTRL_DEEMP_MASK) | deemp[order]);
-}
-
 void audiohw_set_sample_rate(int sampling_control)
 {
     int rate = 0;
diff --git a/firmware/drivers/audio/wm8758.c b/firmware/drivers/audio/wm8758.c
index d698049a8b..e9d4b5c5c7 100644
--- a/firmware/drivers/audio/wm8758.c
+++ b/firmware/drivers/audio/wm8758.c
@@ -172,11 +172,6 @@ void audiohw_close(void)
     wmcodec_write(PWRMGMT2, PWRMGMT2_SLEEP);
 }
 
-void audiohw_set_nsorder(int order)
-{
-    (void)order;
-}
-
 /* Note: Disable output before calling this function */
 void audiohw_set_sample_rate(int sampling_control)
 {
diff --git a/firmware/drivers/audio/wm8975.c b/firmware/drivers/audio/wm8975.c
index 23ce91fb5b..86e463cdff 100644
--- a/firmware/drivers/audio/wm8975.c
+++ b/firmware/drivers/audio/wm8975.c
@@ -226,11 +226,6 @@ void audiohw_close(void)
     wmcodec_write(PWRMGMT1, 0x0);
 }
 
-void audiohw_set_nsorder(int order)
-{
-    (void)order;
-}
-
 /* Note: Disable output before calling this function */
 void audiohw_set_sample_rate(int sampling_control)
 {
diff --git a/firmware/export/wm8721.h b/firmware/export/wm8721.h
index 3611e4d6ee..814535621a 100644
--- a/firmware/export/wm8721.h
+++ b/firmware/export/wm8721.h
@@ -29,7 +29,6 @@
 extern int tenthdb2master(int db);
 
 extern void audiohw_set_master_vol(int vol_l, int vol_r);
-extern void audiohw_set_nsorder(int order);
 extern void audiohw_set_sample_rate(int sampling_control);
 
 /* Register addresses and bits */
diff --git a/firmware/export/wm8731.h b/firmware/export/wm8731.h
index b21568406d..a572546e95 100644
--- a/firmware/export/wm8731.h
+++ b/firmware/export/wm8731.h
@@ -29,7 +29,6 @@
 extern int tenthdb2master(int db);
 
 extern void audiohw_set_master_vol(int vol_l, int vol_r);
-extern void audiohw_set_nsorder(int order);
 extern void audiohw_set_sample_rate(int sampling_control);
 
 /* Register addresses and bits */
diff --git a/firmware/export/wm8758.h b/firmware/export/wm8758.h
index e7f7906651..c094b1296a 100644
--- a/firmware/export/wm8758.h
+++ b/firmware/export/wm8758.h
@@ -34,7 +34,6 @@ extern int tenthdb2mixer(int db);
 extern void audiohw_set_master_vol(int vol_l, int vol_r);
 extern void audiohw_set_lineout_vol(int vol_l, int vol_r);
 extern void audiohw_set_mixer_vol(int channel1, int channel2);
-extern void audiohw_set_nsorder(int order);
 extern void audiohw_set_sample_rate(int sampling_control);
 
 #define RESET                   0x00
diff --git a/firmware/export/wm8975.h b/firmware/export/wm8975.h
index 881e7110bd..e2e443213a 100644
--- a/firmware/export/wm8975.h
+++ b/firmware/export/wm8975.h
@@ -32,7 +32,6 @@ extern int tenthdb2master(int db);
 
 extern void audiohw_set_master_vol(int vol_l, int vol_r);
 extern void audiohw_set_lineout_vol(int vol_l, int vol_r);
-extern void audiohw_set_nsorder(int order);
 extern void audiohw_set_sample_rate(int sampling_control);
 
 /* Register addresses and bits */