diff --git a/src/libmncc/mncc_console.c b/src/libmncc/mncc_console.c
index 912f339..cfe7979 100644
--- a/src/libmncc/mncc_console.c
+++ b/src/libmncc/mncc_console.c
@@ -445,7 +445,6 @@ void process_console(int c)
 	/* handle audio, if sound device is used */
 	sample_t samples[console.latspl + 10], *samples_list[1];
 	uint8_t *power_list[1];
-	double rf_level_db[1];
 	int count;
 	int rc;
 
@@ -469,7 +468,7 @@ void process_console(int c)
 		}
 	}
 	samples_list[0] = samples;
-	count = sound_read(console.sound, samples_list, console.latspl, 1, rf_level_db);
+	count = sound_read(console.sound, samples_list, console.latspl, 1, NULL);
 	if (count < 0) {
 		PDEBUG(DSENDER, DEBUG_ERROR, "Failed to read from sound device (rc = %d)!\n", count);
 		if (count == -EPIPE)
diff --git a/src/libmobile/main_mobile.h b/src/libmobile/main_mobile.h
index 4912057..e958f2c 100644
--- a/src/libmobile/main_mobile.h
+++ b/src/libmobile/main_mobile.h
@@ -42,5 +42,4 @@ void sighandler(int sigset);
 void main_mobile(int *quit, int latency, int interval, void (*myhandler)(void), const char *station_id, int station_id_digits);
 
 void dump_info(void);
-void calibrate_bias(void);
 
diff --git a/src/libsdr/sdr.h b/src/libsdr/sdr.h
index 8d31475..aadc5d7 100644
--- a/src/libsdr/sdr.h
+++ b/src/libsdr/sdr.h
@@ -2,9 +2,10 @@
 enum paging_signal;
 
 int sdr_start(void *inst);
-void *sdr_open(const char *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double bandwidth, double sample_deviation);
+void *sdr_open(const char *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double max_deviation, double max_modulation);
 void sdr_close(void *inst);
 int sdr_write(void *inst, sample_t **samples, uint8_t **power, int num, enum paging_signal *paging_signal, int *on, int channels);
 int sdr_read(void *inst, sample_t **samples, int num, int channels, double *rf_level_db);
 int sdr_get_tosend(void *inst, int latspl);
+void calibrate_bias(void);
 
diff --git a/src/libsound/sound.h b/src/libsound/sound.h
index 71293c0..850832d 100644
--- a/src/libsound/sound.h
+++ b/src/libsound/sound.h
@@ -1,7 +1,7 @@
 
 enum paging_signal;
 
-void *sound_open(const char *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double bandwidth, double sample_deviation);
+void *sound_open(const char *audiodev, double *tx_frequency, double *rx_frequency, int channels, double paging_frequency, int samplerate, int latspl, double max_deviation, double max_modulation);
 int sound_start(void *inst);
 void sound_close(void *inst);
 int sound_write(void *inst, sample_t **samples, uint8_t **power, int num, enum paging_signal *paging_signal, int *on, int channels);
diff --git a/src/libsound/sound_alsa.c b/src/libsound/sound_alsa.c
index c62b7c9..f2f123e 100644
--- a/src/libsound/sound_alsa.c
+++ b/src/libsound/sound_alsa.c
@@ -431,7 +431,8 @@ int sound_read(void *inst, sample_t **samples, int num, int channels, double *rf
 		if (!sender)
 			continue;
 		display_measurements_update(sound->dmp[i], log10((double)max[i] / 32768.0) * 20, 0.0);
-		rf_level_db[i] = 0.0;
+		if (rf_level_db)
+			rf_level_db[i] = 0.0;
 	}
 
 	return rc;