1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/******************************************/
/*
Example program to write N sine tones to
an N channel soundfile.
By default, the program will write an
N channel WAV file. However, it is
simple to change the file type argument
in the FileWvOut constructor.
By Gary P. Scavone, 2000 - 2002.
*/
/******************************************/
#include "SineWave.h"
#include "FileWvOut.h"
#include <cstdlib>
using namespace stk;
void usage(void) {
// Error function in case of incorrect command-line
// argument specifications.
std::cout << "\nuseage: sine N file time fs\n";
std::cout << " where N = number of channels (sines),\n";
std::cout << " file = the .wav file to create,\n";
std::cout << " time = the amount of time to record (in seconds),\n";
std::cout << " and fs = the sample rate (in Hz).\n\n";
exit( 0 );
}
int main( int argc, char *argv[] )
{
float base_freq = 220.0;
int i;
// Minimal command-line checking.
if ( argc != 5 ) usage();
int channels = (int) atoi( argv[1] );
double time = atof( argv[3] );
double srate = atof( argv[4] );
// Create our object instances.
FileWvOut output;
SineWave **oscs = (SineWave **) malloc( channels * sizeof(SineWave *) );
for ( i=0; i<channels; i++ ) oscs[i] = 0;
// If you want to change the default sample rate (set in Stk.h), do
// it before instantiating any objects!!
Stk::setSampleRate( srate );
// Define the sinewaves.
for ( i=0; i<channels; i++ )
oscs[i] = new SineWave;
// Set oscillator frequency(ies) here ... somewhat random.
for ( i=0; i<channels; i++ )
oscs[i]->setFrequency( base_freq + i*(45.0) );
long nFrames = (long) ( time * Stk::sampleRate() );
StkFrames frames( nFrames, channels );
// Open the soundfile for output. Other file format options
// include: FILE_SND, FILE_AIF, FILE_MAT, and FILE_RAW. Other data
// type options include: STK_SINT8, STK_INT24, STK_SINT32,
// STK_FLOAT32, and STK_FLOAT64.
try {
output.openFile( argv[2], channels, FileWrite::FILE_WAV, Stk::STK_SINT16 );
}
catch ( StkError & ) {
goto cleanup;
}
// Here's the runtime code ... no loop
for ( i=0; i<channels; i++ )
oscs[i]->tick( frames, i );
output.tick( frames );
cleanup:
for ( i=0; i<channels; i++ )
delete oscs[i];
free( oscs );
return 0;
}
|
