diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 605c4991..5114c78f 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,7 +3,7 @@ sc_usb_audio Change Log
 
 6.14.1
 ------
-
+    - RESOLVED:   UAC1
 
 6.14.0
 ------
diff --git a/module_usb_audio/endpoint0/descriptors.h b/module_usb_audio/endpoint0/descriptors.h
index c8d02437..c1250f77 100644
--- a/module_usb_audio/endpoint0/descriptors.h
+++ b/module_usb_audio/endpoint0/descriptors.h
@@ -2244,7 +2244,7 @@ const unsigned num_freqs_a1 = MAX(3, (0
 #endif
 ));
 
-#define AC_TOTAL_LENGTH             (AC_LENGTH + (INPUT_INTERFACES_A1 * (19 + num_freqs_a1 * 3)) + (OUTPUT_INTERFACES_A1 * (19 + (num_freqs_a1 *3))))
+#define AC_TOTAL_LENGTH             (AC_LENGTH + (INPUT_INTERFACES_A1 * (17 + NUM_USB_CHAN_IN_FS + num_freqs_a1 * 3)) + (OUTPUT_INTERFACES_A1 * (17 + NUM_USB_CHAN_OUT_FS + (num_freqs_a1 *3))))
 #define STREAMING_INTERFACES        (INPUT_INTERFACES_A1 + OUTPUT_INTERFACES_A1)
 
 /* Number of interfaces for Audio  1.0 (+1 for control ) */
@@ -2320,15 +2320,41 @@ unsigned char cfgDesc_Audio1[] =
     11,                                   /* iTerminal */
 
     /* CS_Interface class specific AC interface feature unit descriptor - mute & volume for dac */
-    0x0A,
+    (8 + NUM_USB_CHAN_OUT_FS),
     UAC_CS_DESCTYPE_INTERFACE,
     UAC_CS_AC_INTERFACE_SUBTYPE_FEATURE_UNIT, /* 2  bDescriptorSubType: FEATURE_UNIT */
     0x0A,                                 /* unitID */
     0x01,                                 /* sourceID - ID of the unit/terminal to which this feature unit is connected */
     0x01,                                 /* controlSize - 1 */
+
     0x00,                                 /* bmaControls(0) */
+#if (NUM_USB_CHAN_OUT_FS > 0)
     0x03,                                 /* bmaControls(1) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 1)    
     0x03,                                 /* bmaControls(2) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 2)
+    0x03,                                 /* bmaControls(3) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 3)    
+    0x03,                                 /* bmaControls(4) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 4)
+    0x03,                                 /* bmaControls(5) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 5)    
+    0x03,                                 /* bmaControls(6) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 6)
+    0x03,                                 /* bmaControls(7) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 7)    
+    0x03,                                 /* bmaControls(8) */
+#endif
+#if (NUM_USB_CHAN_OUT_FS > 8)
+#error NUM_USB_CHAN_OUT_FS > 8 currently supported
+#endif
     0x00,                                 /* String table index */
 
     /* CS_Interface Output Terminal Descriptor - Analogue out to speaker */
@@ -2366,15 +2392,40 @@ unsigned char cfgDesc_Audio1[] =
     0x00,                                 /* Unused */
 
     /* CS_Interface class specific AC interface feature unit descriptor - mute & volume for adc */
-    0x0A,
+    (8 + NUM_USB_CHAN_IN_FS),
     UAC_CS_DESCTYPE_INTERFACE,
     UAC_CS_AC_INTERFACE_SUBTYPE_FEATURE_UNIT, /* 2  bDescriptorSubType: FEATURE_UNIT */
     0x0B,                                 /* unitID */
     0x02,                                 /* sourceID - ID of the unit/terminal to which this feature unit is connected */
     0x01,                                 /* controlSize - 1 */
     0x00,                                 /* bmaControls(0) */
+#if (NUM_USB_CHAN_IN_FS > 0)
     0x03,                                 /* bmaControls(1) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 1)    
     0x03,                                 /* bmaControls(2) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 2)
+    0x03,                                 /* bmaControls(3) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 3)    
+    0x03,                                 /* bmaControls(4) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 4)
+    0x03,                                 /* bmaControls(5) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 5)    
+    0x03,                                 /* bmaControls(6) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 6)
+    0x03,                                 /* bmaControls(7) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 7)    
+    0x03,                                 /* bmaControls(8) */
+#endif
+#if (NUM_USB_CHAN_IN_FS > 8)
+#error NUM_USB_CHAN_IN_FS > 8 currently supported
+#endif
     0x00,                                 /* String table index */
 #endif