Can anyone explain what are the reasons to equal something with null?

Does anyone know any reference guides (links?) on Processing Interfaces cause i am a bit confused on what are they..

Hello..

Hi

I am trying to build a simple metronome. My code is

1. void keyPressed()
   {
     if (key == 'c')
     {
      metro1  = minim.loadFile("1st metron.mp3",buffersize);
     
      metro1.loop(tempo);
    
     }else if(key == 'v')
     {
     metro1.close();
    
     }
      
   }
   

tempo is an integer
i also have a virtual metronome which is shown on the screen

1. ///////////////////////////////////////METRONOME////////////////////////////////////////
   
   if(millis()-start >= tempo)
   {
   start = millis();
   
   counter++;
   
   xpos = xpos+width/17;
   if(xpos>=width)
   {
   xpos=2*width/17;
   }
   if(counter==5)
   {
   counter=1;
   }
   

My problem is that after some seconds it appears a delay between the two countings.

Why is this happening and how can i deal with it?

Thank you.

hello..

is there any way to make a condition like "if this - do this", general into the sketch without the need of rewriting many times.

to be more specific, my project is about musical representation

1. if(noteDuration<=tempo)
   {
   note = quarterNote;
   }
   else if(noteDuration>=tempo && (noteDuration<=2*tempo))
   {
   note = halfNote;
   }
   else if (noteDuration>=2*tempo)
   {
   note = wholeNote;
   
2. }
   

where quarterNote, wholeNote and halfNote are just images that i want to load only at a time.
tempo is just a number im milliseconds

So i say to processing, "if musical pitch is x, load "that" image".
How can i put the first condition into the second one for all the pitches without the need of rewriting it for all the pitches.

i didnt upload the code because its big, raw and chaotic.

i hope my question isnt so silly, any advice would be gratefull.
thank you

Hello Processing forum,

Even if i got some help through my first question, it wasnt really what i was looking for.
So i will make a more simple question.

for every draw() i am having x values. From those values i am getting only the xmax values.

How can i find the time difference between xmax1 and xmax 2 (but not x1 and x2) or
when xmax appear start a counter untill xmax 2.

My first post was http://forum.processing.org/topic/fft-and-duration

i hope this one is more clear,

Thank you

hi

i am very new to processing enviroment and i have a very simple and basic question..

i am using minim.FFT to find the peaks from an audio source.

how i can everytime compare the last two peaks in order to  find how much time has
passed since another peak occurs.

i tried to store the values to an array and then compare the elements but had no lack.

i know its simple  but i dont have the programming knowledge yet to do this.

here is a part of my code that i have stucked to

fft.forward(player.mix);//FFT ON THE BUFFER

for(int i=0;i<spectrum.length;i++)
{
 
spectrum[i] = (fft.getBand(i));//FILL THE ARRAY WITH THE SPECTRUM

line(i,height,i,height-fft.getBand(i));//DRAW THE SPECTRUM

if ((fft.getBand(i)>fft.getBand(maximum))&&fft.getBand(i)>120)
{
  maximum=i;
  currMaxBand = fft.getBand(maxim);
  count=millis()-start;

}

}
start = millis();

my purpose is to find the the time that every maxband lasts.

can anyone help me?

Thank you..