diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 2c92a4e2..3acb245d 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -3,6 +3,8 @@ sc_usb_audio Change Log
 
 6.30.0
 ------
+    - RESOLVED:   Number of PDM microphone channels configured now based on
+    NUM_PDM_MICS define (previously hard-coded)
     - RESOLVED:   PDM microphone clock divide now based MCLK defines (previously hard-coded)
     - CHANGE:     Second microphone decimation core only run if NUM_PDM_MICS > 4
 
diff --git a/module_usb_audio/pdm_mics/mic_array_conf.h b/module_usb_audio/pdm_mics/mic_array_conf.h
index a57e7753..e894cd10 100644
--- a/module_usb_audio/pdm_mics/mic_array_conf.h
+++ b/module_usb_audio/pdm_mics/mic_array_conf.h
@@ -1,7 +1,9 @@
 #ifndef MIC_ARRAY_CONF_H_
 #define MIC_ARRAY_CONF_H_
 
+#include "customdefines.h"
+
 #define MIC_ARRAY_MAX_FRAME_SIZE_LOG2 0
-#define MIC_ARRAY_NUM_MICS 8
+#define MIC_ARRAY_NUM_MICS (NUM_PDM_MICS)
 
 #endif /* MIC_ARRAY_CONF_H_ */
diff --git a/module_usb_audio/pdm_mics/pdm_mic.h b/module_usb_audio/pdm_mics/pdm_mic.h
deleted file mode 100644
index cf6f0e6d..00000000
--- a/module_usb_audio/pdm_mics/pdm_mic.h
+++ /dev/null
@@ -1,37 +0,0 @@
-
-#include "mic_array.h"
-
-#ifdef MIC_PROCESSING_USE_INTERFACE
-/* Interface based user processing */
-typedef interface mic_process_if
-{
-    void transfer_buffers(mic_array_frame_time_domain * unsafe audio, int output[]);
-    void init();
-} mic_process_if;
-
-
-[[combinable]]
-void pdm_buffer(streaming chanend c_ds_output[2], chanend c_audio
-#ifdef MIC_PROCESSING_USE_INTERFACE
-   , client mic_process_if i_mic_process
-#endif
-);
-
-[[combinable]]
-void user_pdm_process(server mic_process_if i_mic_data);
-
-/* PDM interface and decimation cores */
-void pdm_mic(streaming chanend c_ds_output[2]);
-
-#else
-
-/* Simple user hooks/call-backs */
-unsafe void user_pdm_process(mic_array_frame_time_domain * unsafe audio, int output[]);
-
-void user_pdm_init();
-
-/* PDM interface and decimation cores */
-void pdm_mic(streaming chanend c_ds_output[2]);
-
-#endif
-