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bandlimited osc
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@micknoise
micknoise committed Nov 24, 2012
1 parent e6ac66a commit d2e66da
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Showing 3 changed files with 17 additions and 6 deletions.
4 changes: 2 additions & 2 deletions main.cpp
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Expand Up @@ -18,7 +18,7 @@ void setup() {//some inits
void play(double *output) {

// no noise here
out=VCO1.sawn(ramp.phasor(0.1,50,8000));
// out=VCO1.sawn(ramp.phasor(0.1,50,8000));


// Band limited square using two band limited saws. Comment the above and uncomment the below.
Expand All @@ -27,7 +27,7 @@ void play(double *output) {
// out=VCO1.sawn(ramp.phasor(0.1,50,8000))-VCO2.sawn(ramp2.phasor(0.1,50,8000));

// When you're done testing with the ramps, see here for an easy PWM hack with this approach
// out=VCO1.sawn(100)-(VCO2.sawn(100.1)*0.9);
out=VCO1.sawn(100)-(VCO2.sawn(100.1)*0.9);


output[0]=out*0.5;//left channel
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19 changes: 15 additions & 4 deletions maximilian.cpp
View file
Expand Up @@ -59,6 +59,7 @@ int maxiSettings::bufferSize = 1024;
double sineBuffer[514]={0,0.012268,0.024536,0.036804,0.049042,0.06131,0.073547,0.085785,0.097992,0.1102,0.12241,0.13455,0.1467,0.15884,0.17093,0.18301,0.19507,0.20709,0.21909,0.23105,0.24295,0.25485,0.26669,0.2785,0.29025,0.30197,0.31366,0.32529,0.33685,0.34839,0.35986,0.37128,0.38266,0.39395,0.40521,0.41641,0.42752,0.4386,0.44958,0.46051,0.47137,0.48215,0.49286,0.50351,0.51407,0.52457,0.53497,0.54529,0.55554,0.5657,0.57578,0.58575,0.59567,0.60547,0.6152,0.62482,0.63437,0.6438,0.65314,0.66238,0.67151,0.68057,0.68951,0.69833,0.70706,0.7157,0.72421,0.7326,0.74091,0.74908,0.75717,0.76514,0.77298,0.7807,0.7883,0.79581,0.80316,0.81042,0.81754,0.82455,0.83142,0.8382,0.84482,0.85132,0.8577,0.86392,0.87006,0.87604,0.88187,0.8876,0.89319,0.89862,0.90396,0.90912,0.91415,0.91907,0.92383,0.92847,0.93295,0.93729,0.9415,0.94556,0.94949,0.95325,0.95691,0.96039,0.96375,0.96692,0.97,0.9729,0.97565,0.97827,0.98074,0.98306,0.98523,0.98724,0.98914,0.99084,0.99243,0.99387,0.99515,0.99628,0.99725,0.99808,0.99875,0.99927,0.99966,0.99988,0.99997,0.99988,0.99966,0.99927,0.99875,0.99808,0.99725,0.99628,0.99515,0.99387,0.99243,0.99084,0.98914,0.98724,0.98523,0.98306,0.98074,0.97827,0.97565,0.9729,0.97,0.96692,0.96375,0.96039,0.95691,0.95325,0.94949,0.94556,0.9415,0.93729,0.93295,0.92847,0.92383,0.91907,0.91415,0.90912,0.90396,0.89862,0.89319,0.8876,0.88187,0.87604,0.87006,0.86392,0.8577,0.85132,0.84482,0.8382,0.83142,0.82455,0.81754,0.81042,0.80316,0.79581,0.7883,0.7807,0.77298,0.76514,0.75717,0.74908,0.74091,0.7326,0.72421,0.7157,0.70706,0.69833,0.68951,0.68057,0.67151,0.66238,0.65314,0.6438,0.63437,0.62482,0.6152,0.60547,0.59567,0.58575,0.57578,0.5657,0.55554,0.54529,0.53497,0.52457,0.51407,0.50351,0.49286,0.48215,0.47137,0.46051,0.44958,0.4386,0.42752,0.41641,0.40521,0.39395,0.38266,0.37128,0.35986,0.34839,0.33685,0.32529,0.31366,0.30197,0.29025,0.2785,0.26669,0.25485,0.24295,0.23105,0.21909,0.20709,0.19507,0.18301,0.17093,0.15884,0.1467,0.13455,0.12241,0.1102,0.097992,0.085785,0.073547,0.06131,0.049042,0.036804,0.024536,0.012268,0,-0.012268,-0.024536,-0.036804,-0.049042,-0.06131,-0.073547,-0.085785,-0.097992,-0.1102,-0.12241,-0.13455,-0.1467,-0.15884,-0.17093,-0.18301,-0.19507,-0.20709,-0.21909,-0.23105,-0.24295,-0.25485,-0.26669,-0.2785,-0.29025,-0.30197,-0.31366,-0.32529,-0.33685,-0.34839,-0.35986,-0.37128,-0.38266,-0.39395,-0.40521,-0.41641,-0.42752,-0.4386,-0.44958,-0.46051,-0.47137,-0.48215,-0.49286,-0.50351,-0.51407,-0.52457,-0.53497,-0.54529,-0.55554,-0.5657,-0.57578,-0.58575,-0.59567,-0.60547,-0.6152,-0.62482,-0.63437,-0.6438,-0.65314,-0.66238,-0.67151,-0.68057,-0.68951,-0.69833,-0.70706,-0.7157,-0.72421,-0.7326,-0.74091,-0.74908,-0.75717,-0.76514,-0.77298,-0.7807,-0.7883,-0.79581,-0.80316,-0.81042,-0.81754,-0.82455,-0.83142,-0.8382,-0.84482,-0.85132,-0.8577,-0.86392,-0.87006,-0.87604,-0.88187,-0.8876,-0.89319,-0.89862,-0.90396,-0.90912,-0.91415,-0.91907,-0.92383,-0.92847,-0.93295,-0.93729,-0.9415,-0.94556,-0.94949,-0.95325,-0.95691,-0.96039,-0.96375,-0.96692,-0.97,-0.9729,-0.97565,-0.97827,-0.98074,-0.98306,-0.98523,-0.98724,-0.98914,-0.99084,-0.99243,-0.99387,-0.99515,-0.99628,-0.99725,-0.99808,-0.99875,-0.99927,-0.99966,-0.99988,-0.99997,-0.99988,-0.99966,-0.99927,-0.99875,-0.99808,-0.99725,-0.99628,-0.99515,-0.99387,-0.99243,-0.99084,-0.98914,-0.98724,-0.98523,-0.98306,-0.98074,-0.97827,-0.97565,-0.9729,-0.97,-0.96692,-0.96375,-0.96039,-0.95691,-0.95325,-0.94949,-0.94556,-0.9415,-0.93729,-0.93295,-0.92847,-0.92383,-0.91907,-0.91415,-0.90912,-0.90396,-0.89862,-0.89319,-0.8876,-0.88187,-0.87604,-0.87006,-0.86392,-0.8577,-0.85132,-0.84482,-0.8382,-0.83142,-0.82455,-0.81754,-0.81042,-0.80316,-0.79581,-0.7883,-0.7807,-0.77298,-0.76514,-0.75717,-0.74908,-0.74091,-0.7326,-0.72421,-0.7157,-0.70706,-0.69833,-0.68951,-0.68057,-0.67151,-0.66238,-0.65314,-0.6438,-0.63437,-0.62482,-0.6152,-0.60547,-0.59567,-0.58575,-0.57578,-0.5657,-0.55554,-0.54529,-0.53497,-0.52457,-0.51407,-0.50351,-0.49286,-0.48215,-0.47137,-0.46051,-0.44958,-0.4386,-0.42752,-0.41641,-0.40521,-0.39395,-0.38266,-0.37128,-0.35986,-0.34839,-0.33685,-0.32529,-0.31366,-0.30197,-0.29025,-0.2785,-0.26669,-0.25485,-0.24295,-0.23105,-0.21909,-0.20709,-0.19507,-0.18301,-0.17093,-0.15884,-0.1467,-0.13455,-0.12241,-0.1102,-0.097992,-0.085785,-0.073547,-0.06131,-0.049042,-0.036804,-0.024536,-0.012268,0,0.012268
};

// This is a transition table that helps with bandlimited oscs.
double transition[1001]={-0.500003,-0.500003,-0.500023,-0.500063,-0.500121,-0.500179,-0.500259,
-0.50036,-0.500476,-0.500591,-0.500732,-0.500893,-0.501066,-0.501239,
-0.50144,-0.501661,-0.501891,-0.502123,-0.502382,-0.502662,-0.502949,
Expand Down Expand Up @@ -192,8 +193,7 @@ double transition[1001]={-0.500003,-0.500003,-0.500023,-0.500063,-0.500121,-0.50
0.507495,0.507042,0.506589,0.506162,0.505754,0.505356,0.504958,0.504587,
0.504237,0.503895,0.503555,0.50324,0.502949,0.502662,0.502382,0.502123,
0.501891,0.501661,0.50144,0.501239,0.501066,0.500893,0.500732,0.500591,
0.500476,0.50036,0.500259,0.500179,0.500121,0.500063,0.500023,0.500003,
0.500003};
0.500476,0.50036,0.500259,0.500179,0.500121,0.500063,0.500023,0.500003,0.500003};

//This is a lookup table for converting midi to frequency
double mtofarray[129]={0, 8.661957, 9.177024, 9.722718, 10.3, 10.913383, 11.562325, 12.25, 12.978271, 13.75, 14.567617, 15.433853, 16.351599, 17.323914, 18.354048, 19.445436, 20.601723, 21.826765, 23.124651, 24.5, 25.956543, 27.5, 29.135235, 30.867706, 32.703197, 34.647827, 36.708096, 38.890873, 41.203445, 43.65353, 46.249302, 49., 51.913086, 55., 58.27047, 61.735413, 65.406395, 69.295654, 73.416191, 77.781746, 82.406891, 87.30706, 92.498604, 97.998856, 103.826172, 110., 116.540939, 123.470825, 130.81279, 138.591309, 146.832382, 155.563492, 164.813782, 174.61412, 184.997208, 195.997711, 207.652344, 220., 233.081879, 246.94165, 261.62558, 277.182617,293.664764, 311.126984, 329.627563, 349.228241, 369.994415, 391.995422, 415.304688, 440., 466.163757, 493.883301, 523.25116, 554.365234, 587.329529, 622.253967, 659.255127, 698.456482, 739.988831, 783.990845, 830.609375, 880., 932.327515, 987.766602, 1046.502319, 1108.730469, 1174.659058, 1244.507935, 1318.510254, 1396.912964, 1479.977661, 1567.981689, 1661.21875, 1760., 1864.655029, 1975.533203, 2093.004639, 2217.460938, 2349.318115, 2489.015869, 2637.020508, 2793.825928, 2959.955322, 3135.963379, 3322.4375, 3520., 3729.31, 3951.066406, 4186.009277, 4434.921875, 4698.63623, 4978.031738, 5274.041016, 5587.651855, 5919.910645, 6271.926758, 6644.875, 7040., 7458.620117, 7902.132812, 8372.018555, 8869.84375, 9397.272461, 9956.063477, 10548.082031, 11175.303711, 11839.821289, 12543.853516, 13289.75};
Expand Down Expand Up @@ -527,13 +527,14 @@ double *maxiMix::ambisonic(double input,double eight[8],double x,double y,double
return(eight);
}


//This is the maxiSample load function. It just calls read.
bool maxiSample::load(string fileName, int channel) {
myPath = fileName;
readChannel=channel;
return read();
}

// This is for OGG loading
bool maxiSample::loadOgg(string fileName, int channel) {
#ifdef VORBIS
bool result;
Expand Down Expand Up @@ -561,10 +562,12 @@ bool maxiSample::loadOgg(string fileName, int channel) {
return 0;
}

//This sets the playback position to the start of a sample
void maxiSample::trigger() {
position = 0;
}

//This is the main read function.
bool maxiSample::read()
{
bool result;
Expand Down Expand Up @@ -645,13 +648,15 @@ bool maxiSample::read()
return result; // this should probably be something more descriptive
}

//This plays back at the correct speed. Always loops.
double maxiSample::play() {
position++;
if ((long) position == length) position=0;
output = (double) temp[(long)position]/32767.0;
return output;
}

//This plays back at the correct speed. Only plays once. To retrigger, you have to manually reset the position
double maxiSample::playOnce() {
position++;
if ((long) position<length)
Expand All @@ -663,6 +668,7 @@ double maxiSample::playOnce() {

}

//Same as above but takes a speed value specified as a ratio, with 1.0 as original speed
double maxiSample::playOnce(double speed) {
position=position+((speed*chandiv)/(maxiSettings::sampleRate/mySampleRate));
double remainder = position - (long) position;
Expand All @@ -673,6 +679,7 @@ double maxiSample::playOnce(double speed) {
return(output);
}

//As above but looping
double maxiSample::play(double speed) {
double remainder;
long a,b;
Expand Down Expand Up @@ -718,10 +725,12 @@ double maxiSample::play(double speed) {
return(output);
}

//placeholder
double maxiSample::play(double frequency, double start, double end) {
return play(frequency, start, end, position);
}

//This allows you to say how often a second you want a specific chunk of audio to play
double maxiSample::play(double frequency, double start, double end, double &pos) {
double remainder;
if (end>=length) end=length-1;
Expand Down Expand Up @@ -779,7 +788,7 @@ double maxiSample::play(double frequency, double start, double end, double &pos)
}


//better cubic inerpolation. Cobbled together from various (pd externals, yehar, other places).
//Same as above. better cubic inerpolation. Cobbled together from various (pd externals, yehar, other places).
double maxiSample::play4(double frequency, double start, double end) {
double remainder;
double a,b,c,d,a1,a2,a3;
Expand Down Expand Up @@ -854,6 +863,8 @@ double maxiSample::play4(double frequency, double start, double end) {
return(output);
}


//You don't need to worry about this stuff.
double maxiSample::bufferPlay(unsigned char &bufferin,long length) {
double remainder;
short* buffer = (short *)&bufferin;
Expand Down
Binary file modified ...oj/project.xcworkspace/xcuserdata/mickgrierson.xcuserdatad/UserInterfaceState.xcuserstate
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