function [volume] = Noise_Volume_regulation()
%% code eventually not used but present in the scripts


% 'AirCool_Magstim_48000.wav'
% arrow right for increase
% arrow left for decrease


volume = 0.2;

[audiodata, infreq] = psychwavread('AirCool_Magstim_48000.wav');

noise_seconds  = 60;

noise_short = audiodata(1:infreq*noise_seconds)';

pasound2 = PsychPortAudio('Open', []);

sound2 = [noise_short;  noise_short];

PsychPortAudio('Volume', pasound2, volume);

PsychPortAudio('FillBuffer', pasound2, sound2);

noise_ts = PsychPortAudio('Start',pasound2, 1, 1);

while 1

[z key_tmp] = KbPressWait;

key = find(key_tmp);

if key == 37 % arrow left
    
PsychPortAudio('Stop', pasound2,0);    
noise_ts = PsychPortAudio('Start',pasound2, 1, 0);

   volume = volume-0.05; 
   if volume <= 0
       volume = 0;
   end
   PsychPortAudio('Volume', pasound2, volume);
   disp(num2str(volume))
end


if key == 39 % arrow right (increases)
PsychPortAudio('Stop', pasound2,0);    
noise_ts = PsychPortAudio('Start',pasound2, 1, 0);
   volume = volume+0.05; 
   if volume >= 1
       volume = 1;
   end
   PsychPortAudio('Volume', pasound2, volume);
    disp(num2str(volume))
end

% stop it
if key(1) == 27 || key(1) == 17 % esc
  PsychPortAudio('Close');
  break
end


end