//begin main
int main (void) {
short waveform [TOTAL_SAMPLES] ;
FILE *f ;
f = wavfile_open("music.wav") ;
if(!f) {
printf("couldn't open music.wav for writing: %s",strerror(errno)) ;
return 1 ;
}
char input ;
float octavefactor = 1 ;
float notelength = .5 * WAVFILE_SAMPLES_PER_SECOND ; //quarter note is default note length
double frequency ;
printf("Please enter valid instructions for octaves, notes, rests, and their lengths. Enter X for end of song.\n") ;
do {
scanf(" %c", &input) ;
if (input == 'X') break ;
int change = determine_change_type(input) ;
int volume = 30000 ;
switch (change) {
case 0:
printf("Error. Invalid character entered. File was written ignoring this invalid data.\n") ;
break ;
case 1:
frequency = letters_to_frequency(input) * octavefactor ;
update_waveform(waveform, volume, frequency, notelength, f) ; //only updated when a note is read
break ;
case 2:
octavefactor *= change_octave(input) ;
break ;
case 3:
notelength = new_notelength(input)*WAVFILE_SAMPLES_PER_SECOND ;
break ;
case 4:
insert_rest(waveform, notelength, f) ;
}
} while (input != 'X' ) ;
wavfile_close(f) ;
return 0 ;
}
int main(int argc, char* argv[])
{
PaError err = paNoError;
int device_id;
BOOL rv;
err = Pa_Initialize();
if (err != paNoError) {
fprintf(stderr, "Pa_Initialize() failed...\n");
exit(1);
}
if (argc != 3) {
printf("usage: %s devide_id wav_file\n\n", argv[0]);
print_deviceinfo();
Pa_Terminate();
return 1;
}
rv = wavfile_open(argv[2]);
if (rv == FALSE) {
fprintf(stderr, "wav file open failed...\n");
Pa_Terminate();
exit(1);
}
device_id = atoi(argv[1]);
rv = audio_start(device_id);
if (rv == FALSE) {
fprintf(stderr, "AudioDevice initialize failed...device_id=%d\n", device_id);
Pa_Terminate();
return 1;
}
while (1) {
Pa_Sleep(100);
if (finish_flag == TRUE) break;
}
audio_stop();
Pa_Terminate();
wavfile_close();
return 0;
}
int main()
{
short waveform[NUM_SAMPLES];
double frequency = 440.0;
int volume = 32000;
FILE * f;
int length = NUM_SAMPLES;
int i;
f = wavfile_open("sound.wav");
if(!f) {
printf("couldn't open sound.wav for writing: %s",strerror(errno));
return 1;
}
for(i=0;i<length;i = i+4) {
double t = (double) i / WAVFILE_SAMPLES_PER_SECOND;
waveform[i] = volume*sin(frequency*t*2*M_PI);
}
for(i=1;i<length;i = i + 4) {
double t = (double) i / WAVFILE_SAMPLES_PER_SECOND;
waveform[i] = (volume*(.3333))*sin(frequency*(.3333)*t*2*M_PI);
}
for(i=2;i<length;i = i + 4) {
double t = (double) i / WAVFILE_SAMPLES_PER_SECOND;
waveform[i] = (volume*(.5))*sin(frequency*(.5)*t*2*M_PI);
}
for(i=3;i<length;i = i+4) {
double t = (double) i / WAVFILE_SAMPLES_PER_SECOND;
waveform[i] = volume*.25*sin(frequency*.25*t*2*M_PI);
}
wavfile_write(f,waveform,length);
wavfile_close(f);
return 0;
}
int main (void)
{
short waveform[NUM_SAMPLES];
double frequency = 440.0;
int octave = 1;
int volume = 30000;
int length = NUM_SAMPLES;
char c;
FILE * f = wavfile_open("music.wav");
while (c!='X')
{
c = receive_input();
switch (c)
{
default:
printf("%d is not a valid input\n", c);
break;
case 'a':
frequency = 415.30 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'A':
frequency = 440.00 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'b':
frequency = 466.16 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'B':
frequency = 493.88 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'C':
create_note(volume, length, frequency, waveform, f);
frequency = 523.25 * octave;
break;
case 'd':
frequency = 554.37 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'D':
frequency = 587.33 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'e':
frequency = 622.25 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'E':
frequency = 659.26 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'F':
frequency = 698.46 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'g':
frequency = 739.99 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case 'G':
frequency = 783.99 * octave;
create_note(volume, length, frequency, waveform, f);
break;
case '.':
frequency = 0;
create_note(volume, length, frequency, waveform, f);
break;
case '+':
octave*=2;
break;
case '-':
octave/=2;
break;
case '1':
length = NUM_SAMPLES;
break;
case '2':
length = NUM_SAMPLES/2;
break;
case '4':
length = NUM_SAMPLES/4;
break;
case '8':
length = NUM_SAMPLES/8;
break;
case '6':
length = NUM_SAMPLES/16;
break;
case 'X':
wavfile_close(f);
break;
}
}
return 0;
}
