source: orbit/octave/GenerateAudioCommand/initCodeGenAndroid.m @ a0b523e

function initWave=initCodeGenAndroid(audioFileName); 

% code: array of 1s and 0s. 1 means bit "1", 0 means bit "0".
% audioFileName: like 'audio.wav'.
% Multiplyer: value around 1, to change "carrier" period.
bps = 16;       % bits per sample
sps = 48000;     % sample rate [samples/s]

longHIGH=45+3;
longLOW=89+7;
mediumLOW=21+2;
shortHIGH=5;
shortLOW=8;
pause=480;
space=4049;

initWave=[halfSineGenDirect('u',longHIGH,0,1,sps);zeros(longLOW,1);halfSineGenDirect('u',longHIGH,0,1,sps);zeros(longLOW,1);halfSineGenDirect('u',longHIGH,0,1,sps);halfSineGenDirect('d',mediumLOW,0,1,sps);halfSineGenDirect('u',shortHIGH,0,1,sps)];

initWave2=[initWave;halfSineGenDirect('d',shortLOW,0,1,sps)];
initWave=[initWave;halfSineGenDirect('d',mediumLOW,0,1,sps)];


for i=1:4
        initWave=[initWave;halfSineGenDirect('u',shortHIGH,0,1,sps);halfSineGenDirect('d',shortLOW,0,1,sps);];
        initWave2=[initWave2;halfSineGenDirect('u',shortHIGH,0,1,sps); halfSineGenDirect('d',shortLOW,0,1,sps);];
        endfor

initWave=[initWave;halfSineGenDirect('u',shortHIGH,0,1,sps);halfSineGenDirect('d',mediumLOW,0,1,sps);halfSineGenDirect('u',shortHIGH,0,1,sps)];

initWave2=[initWave2;halfSineGenDirect('u',shortHIGH,0,1,sps);     halfSineGenDirect('d',mediumLOW,0,1,sps);halfSineGenDirect('u',  shortHIGH,0,1,sps)];

initWave=[initWave;zeros(pause,1);initWave;zeros(pause,1);initWave;zeros(pause,1);initWave2;zeros(pause,1);initWave2;zeros(pause,1);initWave2;zeros(pause,1)];



wavwrite(initWave, sps, bps, audioFileName);