diff --git a/src/Makefile b/src/Makefile
index 4444023..28f1bac 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,7 +1,7 @@
-SRC = util.c irmc.c cwprotocol.c beep.c
+SRC = irmc.c cwprotocol.c beep.c
 OBJ = ${SRC:.c=.o}
 LDFLAGS = -lportaudio -lpthread -lm 
-CFLAGS = -Wall -Wno-format-zero-length -Wno-unused-function
+CFLAGS = -Wall 
 INSTALLDIR = ${HOME}/bin
 
 all: options irmc 
@@ -19,7 +19,7 @@ options:
 
 irmc:   ${OBJ}
 	@echo CC -o $@
-	@${CC} -o $@ ${OBJ} ${LDFLAGS} 
+	@${CC} -o $@ ${OBJ} ${LDFLAGS}
 
 java:
 	java -jar test/MorseKOB.jar 
@@ -27,12 +27,5 @@ java:
 clean:
 	@echo cleaning
 	@rm -f irmc irmc.core ${OBJ} 
-
-linux: 	${OBJ}
-	@echo CC -o irmc
-	@${CC} -o irmc ${OBJ} ${LDFLAGS} -lasound
-
-
-
 install: irmc
 	cp irmc ${INSTALLDIR}
diff --git a/src/beep.c b/src/beep.c
index 82ba80f..a98fe24 100644
--- a/src/beep.c
+++ b/src/beep.c
@@ -2,15 +2,16 @@
 #include <stdlib.h>
 #include <stdint.h>
 #include <unistd.h> // for usleep()
-
+#include <portaudio.h>
 #include "beep.h"
 
-#ifdef PORTAUDIO 
+ 
 // http://stackoverflow.com/questions/7678470/generating-sound-of-a-particular-frequency-using-gcc-in-ubuntu
 
 static PaStream *stream;
 static paTestData data;
 
+
 /* This routine will be called by the PortAudio engine when audio is needed.
 ** It may called at interrupt level on some machines so don't do anything
 ** that could mess up the system like calling malloc() or free().
@@ -87,7 +88,7 @@ int buzzer_start(void)
     outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
     outputParameters.channelCount = 1;       /* stereo output */
     outputParameters.sampleFormat = paUInt8; /* 32 bit floating point output */
-    outputParameters.suggestedLatency = 30; //Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
+    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
     outputParameters.hostApiSpecificStreamInfo = NULL;
 
     err = Pa_OpenStream(
@@ -133,18 +134,16 @@ error:
     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
     return err;
 }
+void msleep(int d){
+    usleep(d*1000);
+}
+
 
 int beep(double freq_hz, double duration_sec)
 {
-	if (freq_hz > 0.0) {	
-		buzzer_set_freq(freq_hz);
-		msleep(duration_sec*1000.);
-		buzzer_set_freq(0.);
-	}
-	else
-	{
-		msleep(duration_sec*1000.);
-	}
+	buzzer_set_freq(freq_hz);
+	msleep(duration_sec*1000.);
+	buzzer_set_freq(0.);
 	return 0;
 }
 int beep_init()
@@ -153,102 +152,31 @@ int beep_init()
 	return 0;
 }
 
-int beep_close()
-{
-	buzzer_stop();
-	return 0;
-}
 
 int beep_test(void)
 {
+
+    // notes frequency chart: http://www.phy.mtu.edu/~suits/notefreqs.html
+
     buzzer_start();
     buzzer_set_freq(261);
+    msleep(250);
+    buzzer_set_freq(0);
+    msleep(250);
+    buzzer_set_freq(329);
+    msleep(250);
+    buzzer_set_freq(349);
+    msleep(250);
+    buzzer_set_freq(392);
+    msleep(250);
+    buzzer_set_freq(440);
+    msleep(250);
+    buzzer_set_freq(494);
+    msleep(250);
+    buzzer_beep(523, 200);
+    msleep(250);
+
     buzzer_stop();
+
     return 0;
 }
-
-#endif
-
-
-
-// Raspi does not work with portaudio?!
-#ifdef ALSA 
-// https://www.raspberrypi.org/forums/viewtopic.php?t=84485&p=603451
-
-static char *device = "hw:0,0"; /* playback device */
-snd_output_t *output = NULL;
-    snd_pcm_t *handle;
-
-int beep(double freq_hz, double duration_sec)
-{
-if (freq_hz <= 0.0)
-{
-		usleep(duration_sec*1000.*1000);
-return 0;
-}
-  double p1,p2,f1,f2;
-    unsigned int i,j;
-    snd_pcm_sframes_t frames;
-   
- unsigned int up_count = (unsigned int)(SAMPLE_RATE*1.0 * duration_sec);
- 
-//printf(" %d %f ", up_count, duration_sec); 
-    p1 = p2 = f1 = f2 = 0.02;//SAMPLE_RATE/freq_hz;//0.02;
-i=0;
-    for (i = 0; i < up_count; ) {
-   for (j = 0; j < FRAMES*2 ; j+=2)
-   //for (j = 0; j < up_count*2; j+=2)
-   {  
-i += 1;
-if (i<up_count)
-{
-       buffer[j] = 1000.0 * sin(p1);
-       buffer[j+1] = 1000.0 * sin(p2);
-       p1 += f1;
-       p2 += f2;
-}
-//else
-//{buffer[j]=buffer[j+1]=0.;}
-
-   }
-
-   frames = snd_pcm_writei(handle, buffer, FRAMES);
-
-   if (frames < 0)
-       frames = snd_pcm_recover(handle, frames, 0);
-   if (frames < 0) {
-       //break;
-   }
-   if (frames > 0 && frames < FRAMES)
-       printf("Short write (expected %li, wrote %li)\n", FRAMES, (long)frames);
-    }
-    return 0;
-
-}
-int beep_init()
-{
-    int err;
-
-   if ((err = snd_pcm_open(&handle, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
-   printf("Playback open error: %s\n", snd_strerror(err));
-   exit(EXIT_FAILURE);
-    }
-    if ((err = snd_pcm_set_params(handle,
-              SND_PCM_FORMAT_S16_LE,
-              SND_PCM_ACCESS_RW_INTERLEAVED,
-              2,
-              SAMPLE_RATE,
-              1,
-              500000)) < 0) { /* 0.5sec */
-   printf("Playback open error: %s\n", snd_strerror(err));
-   exit(EXIT_FAILURE);
-    }
- return 0;
-}
-int beep_close()
-{
-    snd_pcm_close(handle);
-	return 0;
-}
-
-#endif
diff --git a/src/beep.h b/src/beep.h
index 4d1b04c..e3ebf83 100644
--- a/src/beep.h
+++ b/src/beep.h
@@ -1,27 +1,15 @@
+#include <stdio.h>
 #include <math.h>
-
-#ifdef __MACH__
-#define PORTAUDIO
-#endif
-
-#ifdef __arm__
-//#define ALSA
-#define PORTAUDIO
-#endif
-
-#ifdef PORTAUDIO
-#include <portaudio.h>
-#endif
+#include "portaudio.h"
 
 #define NUM_SECONDS   (5)
-#define SAMPLE_RATE   (48000)
+#define SAMPLE_RATE   (44100)
 #define FRAMES_PER_BUFFER  (64)
 
 #ifndef M_PI
 #define M_PI  (3.14159265)
 #endif
 
-#ifdef PORTAUDIO
 typedef struct
 {
     uint32_t total_count;
@@ -32,32 +20,13 @@ typedef struct
     uint32_t freq;
 } paTestData;
 
-static int patestCallback( const void *inputBuffer, void *outputBuffer,
-                           unsigned long framesPerBuffer,
-                           const PaStreamCallbackTimeInfo* timeInfo,
-                           PaStreamCallbackFlags statusFlags,
-                           void *userData );
-
 void buzzer_set_freq(int frequency);
 void buzzer_beep(int frequency, int msecs);
 int buzzer_start(void);
 int buzzer_stop();
 void msleep(int d);
 int beep_test(void);
-#endif
-
-#ifdef ALSA
-#include <stdint.h>
-#include <alsa/asoundlib.h>
-#include <math.h>
-
-#define FRAMES 32L //1024L //16384L
-
-int16_t buffer[FRAMES*2]; /* 16bit stereo sound samples */
-
-#endif
 
 // compatibility to old interface
 int beep(double freq_hz, double duration_sec);
 int beep_init();
-int beep_close();
diff --git a/src/irmc.c b/src/irmc.c
index d2d49d2..4f47daa 100644
--- a/src/irmc.c
+++ b/src/irmc.c
@@ -15,9 +15,18 @@
 #include <pthread.h>
 #include <signal.h>
 #include <arpa/inet.h>
+#include <time.h>
+#include <sys/time.h>
+#include <stdio.h>
 
-
-// raspi wiring: http://raspberrypiguide.de/howtos/raspberry-pi-gpio-how-to/
+#ifdef __MACH__
+    #include <mach/clock.h>
+    #include <mach/mach.h>
+#else
+    #include <linux/ioctl.h>
+    #include <asm-generic/ioctl.h>
+    #include <asm-generic/termios.h>
+#endif 
 
 //#define DEBUG 1
 
@@ -25,7 +34,6 @@
 
 #include "cwprotocol.h"
 #include "beep.h"
-#include "util.h"
 
 int serial_status = 0, fd_serial, numbytes;
 
@@ -49,6 +57,59 @@ char last_sender[16];
 int translate = 1;
 int audio_status = 1;
 
+/* portable time, as listed in https://gist.github.com/jbenet/1087739  */
+void current_utc_time(struct timespec *ts) {
+#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
+  clock_serv_t cclock;
+  mach_timespec_t mts;
+  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+  clock_get_time(cclock, &mts);
+  mach_port_deallocate(mach_task_self(), cclock);
+  ts->tv_sec = mts.tv_sec;
+  ts->tv_nsec = mts.tv_nsec;
+#else
+  clock_gettime(CLOCK_REALTIME, ts);
+#endif
+}
+
+/* a better clock() in milliseconds */
+long fastclock(void)
+{
+	struct timespec t;
+	long r;
+
+	current_utc_time (&t);
+	r = t.tv_sec * 1000;
+	r = r + t.tv_nsec / 1000000;
+	return r;
+}
+
+int kbhit (void)
+{
+  	struct timeval tv;
+  	fd_set rdfs;
+
+  	tv.tv_sec = 0;
+  	tv.tv_usec = 0;
+
+  	FD_ZERO(&rdfs);
+  	FD_SET (STDIN_FILENO, &rdfs);
+
+  	select (STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
+  	return FD_ISSET(STDIN_FILENO, &rdfs);
+}
+
+
+/* get sockaddr, IPv4 or IPv6: */
+void *get_in_addr(struct sockaddr *sa)
+{
+	if (sa->sa_family == AF_INET) {
+		return &(((struct sockaddr_in*)sa)->sin_addr);
+	}
+
+	return &(((struct sockaddr_in6*)sa)->sin6_addr);
+}
+
 
 // disconnect from the server
 void inthandler(int sig)
@@ -60,7 +121,6 @@ void inthandler(int sig)
 	exit(1);
 }
 
-// main tx loop
 void txloop (void)
 {
 	key_press_t1 = fastclock();
@@ -93,7 +153,7 @@ void txloop (void)
 	}
 }
 
-// screen output 
+
 void message(int msg)
 {       
 	switch(msg){
@@ -229,9 +289,7 @@ int main(int argc, char *argv[])
 	inet_ntop(p->ai_family, get_in_addr((struct sockaddr *)p->ai_addr),
 			s, sizeof s);
 	fprintf(stderr, "Connected to %s.\n", s);
-
 	beep_init();
-
 	if ((strcmp (serialport, "")) != 0) 
 		tx_method = TX_SERIAL; 
 
@@ -342,7 +400,7 @@ int main(int argc, char *argv[])
 	send(fd_socket, &disconnect_packet, SIZE_COMMAND_PACKET, 0);	
 	close(fd_socket);
 	close(fd_serial);
-	beep_close();
+	buzzer_stop();
 
 	exit(0); 
 }
diff --git a/src/util.c b/src/util.c
deleted file mode 100644
index a4a9cbd..0000000
--- a/src/util.c
+++ /dev/null
@@ -1,103 +0,0 @@
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <netdb.h>
-#include <sys/types.h>
-#include <netinet/in.h>
-#include <sys/socket.h>
-#include <sys/ioctl.h>
-#include <math.h>
-#include <fcntl.h>
-#include <pthread.h>
-#include <signal.h>
-#include <arpa/inet.h>
-#include <time.h>
-#include <sys/time.h>
-#include <arpa/inet.h>
-#include <unistd.h> // for usleep()
-
-
-// Detect OSX
-#ifdef __MACH__
-    #include <mach/clock.h>
-    #include <mach/mach.h>
-#endif 
-
-// Detect Raspi
-#ifdef __ARM
-    #include <linux/ioctl.h>
-    #include <asm-generic/ioctl.h>
-    #include <asm-generic/termios.h>
-#endif
-
-
-
-
-#include "util.h"
-
-/* portable time, as listed in https://gist.github.com/jbenet/1087739  */
-void current_utc_time(struct timespec *ts) {
-#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
-  clock_serv_t cclock;
-  mach_timespec_t mts;
-  host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
-  clock_get_time(cclock, &mts);
-  mach_port_deallocate(mach_task_self(), cclock);
-  ts->tv_sec = mts.tv_sec;
-  ts->tv_nsec = mts.tv_nsec;
-#else
-  clock_gettime(CLOCK_REALTIME, ts);
-#endif
-}
-
-
-
-
-
-/* a better clock() in milliseconds */
-long fastclock(void)
-{
-	struct timespec t;
-	long r;
-
-	current_utc_time (&t);
-	r = t.tv_sec * 1000;
-	r = r + t.tv_nsec / 1000000;
-	return r;
-}
-
-
-int kbhit (void)
-{
-  	struct timeval tv;
-  	fd_set rdfs;
-
-  	tv.tv_sec = 0;
-  	tv.tv_usec = 0;
-
-  	FD_ZERO(&rdfs);
-  	FD_SET (STDIN_FILENO, &rdfs);
-
-  	select (STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
-  	return FD_ISSET(STDIN_FILENO, &rdfs);
-}
-
-
-/* get sockaddr, IPv4 or IPv6: */
-void *get_in_addr(struct sockaddr *sa)
-{
-	if (sa->sa_family == AF_INET) {
-		return &(((struct sockaddr_in*)sa)->sin_addr);
-	}
-
-	return &(((struct sockaddr_in6*)sa)->sin6_addr);
-}
-
-void msleep(int d)
-{
-    usleep(d*1000);
-}
-
diff --git a/src/util.h b/src/util.h
deleted file mode 100644
index da857f3..0000000
--- a/src/util.h
+++ /dev/null
@@ -1,5 +0,0 @@
-void current_utc_time(struct timespec *ts);
-long fastclock(void);
-int kbhit (void);
-void msleep(int d);
-void *get_in_addr(struct sockaddr *sa);