diff --git a/src/radio/main.c b/src/radio/main.c
index 1c399c5..89b221c 100644
--- a/src/radio/main.c
+++ b/src/radio/main.c
@@ -131,7 +131,7 @@ void print_help(const char *arg0)
 	printf(" -D --deviation\n");
 	printf("        Give deviation of frequency modulated signal. (default %.0f)\n", deviation);
 	printf(" -I --modulation-index 0..1\n");
-	printf("        Give modulation index of amplitude modulated signal. (default %.0f)\n", deviation);
+	printf("        Give modulation index of amplitude modulated signal. (default %.0f)\n", modulation_index);
 	printf(" -E --emphasis <uS> | 0\n");
 	printf("        Use given time constant of pre- and de-emphasis for frequency\n");
 	printf("        modulation. Give 0 to disbale. (default = %.0f uS)\n", time_constant_us);
diff --git a/src/radio/radio.c b/src/radio/radio.c
index a071fac..2466364 100644
--- a/src/radio/radio.c
+++ b/src/radio/radio.c
@@ -146,7 +146,7 @@ int radio_init(radio_t *radio, int latspl, int samplerate, const char *tx_wave_f
 
 	if (rx_wave_file) {
 		/* open wave file */
-		radio->rx_audio_samplerate = 4800;
+		radio->rx_audio_samplerate = 48000;
 		radio->rx_audio_channels = (radio->stereo) ? 2 : 1;
 		rc = wave_create_record(&radio->wave_rx_rec, rx_wave_file, radio->rx_audio_samplerate, radio->rx_audio_channels, 1.0);
 		if (rc < 0) {
@@ -177,10 +177,12 @@ int radio_init(radio_t *radio, int latspl, int samplerate, const char *tx_wave_f
 		PDEBUG(DRADIO, DEBUG_ERROR, "No sound card support compiled in!\n");
 		goto error;
 #endif
+#if 0
 	} else {
 		rc = -ENOTSUP;
 		PDEBUG(DRADIO, DEBUG_ERROR, "No RX audio sink is selected, try \"--audio-device default\"!\n");
 		goto error;
+#endif
 	}
 
 	/* check if sample rate is too low */